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Finding the Fourth Proportional to 415,419.57, 623,129.35 and 99,876.47

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Solution

The fourth proportional to 415,419.57, 623,129.35 and 99,876.47 is: 149,814.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,419.57 : 623,129.35 = 99,876.47 : x
  2. Step 2: Convert to fraction form
    415,419.57/623,129.35 = 99,876.47/x
  3. Step 3: Cross multiply
    415,419.57x = 623,129.35 × 99,876.47
  4. Step 4: Simplify right side
    415,419.57x = 62,235,961,638.91
  5. Step 5: Solve for x
    x = 62,235,961,638.91/415,419.57
  6. Step 6: Final answer
    x = 149,814.71

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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.