Home / 90,100.76-124,205.20-77,292.23

Finding the Fourth Proportional to 90,100.76, 124,205.20 and 77,292.23

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Solution

The fourth proportional to 90,100.76, 124,205.20 and 77,292.23 is: 106,548.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,100.76 : 124,205.20 = 77,292.23 : x
  2. Step 2: Convert to fraction form
    90,100.76/124,205.20 = 77,292.23/x
  3. Step 3: Cross multiply
    90,100.76x = 124,205.20 × 77,292.23
  4. Step 4: Simplify right side
    90,100.76x = 9,600,096,071.34
  5. Step 5: Solve for x
    x = 9,600,096,071.34/90,100.76
  6. Step 6: Final answer
    x = 106,548.45

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Half scale
Find fourth proportional to 180,201.51, 248,410.40 and 154,584.45
Double scale
Find fourth proportional to 90,101.76, 124,206.58 and 77,293.23
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.