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Finding the Fourth Proportional to 402,486.92, 603,355.16 and 136,061.12

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Solution

The fourth proportional to 402,486.92, 603,355.16 and 136,061.12 is: 203,964.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,486.92 : 603,355.16 = 136,061.12 : x
  2. Step 2: Convert to fraction form
    402,486.92/603,355.16 = 136,061.12/x
  3. Step 3: Cross multiply
    402,486.92x = 603,355.16 × 136,061.12
  4. Step 4: Simplify right side
    402,486.92x = 82,093,175,130.30
  5. Step 5: Solve for x
    x = 82,093,175,130.30/402,486.92
  6. Step 6: Final answer
    x = 203,964.83

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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.