Home / 285,943.19-428,917.85-86,265.30

Finding the Fourth Proportional to 285,943.19, 428,917.85 and 86,265.30

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Solution

The fourth proportional to 285,943.19, 428,917.85 and 86,265.30 is: 129,398.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,943.19 : 428,917.85 = 86,265.30 : x
  2. Step 2: Convert to fraction form
    285,943.19/428,917.85 = 86,265.30/x
  3. Step 3: Cross multiply
    285,943.19x = 428,917.85 × 86,265.30
  4. Step 4: Simplify right side
    285,943.19x = 37,000,726,574.28
  5. Step 5: Solve for x
    x = 37,000,726,574.28/285,943.19
  6. Step 6: Final answer
    x = 129,398.88

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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.