Home / 81,479.19-122,221.35-25,319.60

Finding the Fourth Proportional to 81,479.19, 122,221.35 and 25,319.60

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Solution

The fourth proportional to 81,479.19, 122,221.35 and 25,319.60 is: 37,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,479.19 : 122,221.35 = 25,319.60 : x
  2. Step 2: Convert to fraction form
    81,479.19/122,221.35 = 25,319.60/x
  3. Step 3: Cross multiply
    81,479.19x = 122,221.35 × 25,319.60
  4. Step 4: Simplify right side
    81,479.19x = 3,094,595,693.46
  5. Step 5: Solve for x
    x = 3,094,595,693.46/81,479.19
  6. Step 6: Final answer
    x = 37,980.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.