Home / 138,101.56-190,551.54-80,729.74

Finding the Fourth Proportional to 138,101.56, 190,551.54 and 80,729.74

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Solution

The fourth proportional to 138,101.56, 190,551.54 and 80,729.74 is: 111,390.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,101.56 : 190,551.54 = 80,729.74 : x
  2. Step 2: Convert to fraction form
    138,101.56/190,551.54 = 80,729.74/x
  3. Step 3: Cross multiply
    138,101.56x = 190,551.54 × 80,729.74
  4. Step 4: Simplify right side
    138,101.56x = 15,383,176,280.80
  5. Step 5: Solve for x
    x = 15,383,176,280.80/138,101.56
  6. Step 6: Final answer
    x = 111,390.32

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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.