Home / 425,417.13-638,086.82-129,929.13

Finding the Fourth Proportional to 425,417.13, 638,086.82 and 129,929.13

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Solution

The fourth proportional to 425,417.13, 638,086.82 and 129,929.13 is: 194,881.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,417.13 : 638,086.82 = 129,929.13 : x
  2. Step 2: Convert to fraction form
    425,417.13/638,086.82 = 129,929.13/x
  3. Step 3: Cross multiply
    425,417.13x = 638,086.82 × 129,929.13
  4. Step 4: Simplify right side
    425,417.13x = 82,906,064,737.42
  5. Step 5: Solve for x
    x = 82,906,064,737.42/425,417.13
  6. Step 6: Final answer
    x = 194,881.82

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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.