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Finding the Fourth Proportional to 445,505.82, 668,189.61 and 129,929.82

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Solution

The fourth proportional to 445,505.82, 668,189.61 and 129,929.82 is: 194,874.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,505.82 : 668,189.61 = 129,929.82 : x
  2. Step 2: Convert to fraction form
    445,505.82/668,189.61 = 129,929.82/x
  3. Step 3: Cross multiply
    445,505.82x = 668,189.61 × 129,929.82
  4. Step 4: Simplify right side
    445,505.82x = 86,817,755,753.17
  5. Step 5: Solve for x
    x = 86,817,755,753.17/445,505.82
  6. Step 6: Final answer
    x = 194,874.57

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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.