Home / 461,321.20-691,981.80-128,897.20

Finding the Fourth Proportional to 461,321.20, 691,981.80 and 128,897.20

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Solution

The fourth proportional to 461,321.20, 691,981.80 and 128,897.20 is: 193,345.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,321.20 : 691,981.80 = 128,897.20 : x
  2. Step 2: Convert to fraction form
    461,321.20/691,981.80 = 128,897.20/x
  3. Step 3: Cross multiply
    461,321.20x = 691,981.80 × 128,897.20
  4. Step 4: Simplify right side
    461,321.20x = 89,194,516,470.96
  5. Step 5: Solve for x
    x = 89,194,516,470.96/461,321.20
  6. Step 6: Final answer
    x = 193,345.80

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Similar ratio
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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.