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Finding the Fourth Proportional to 424,165.78, 636,540.30 and 158,139.10

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Solution

The fourth proportional to 424,165.78, 636,540.30 and 158,139.10 is: 237,317.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,165.78 : 636,540.30 = 158,139.10 : x
  2. Step 2: Convert to fraction form
    424,165.78/636,540.30 = 158,139.10/x
  3. Step 3: Cross multiply
    424,165.78x = 636,540.30 × 158,139.10
  4. Step 4: Simplify right side
    424,165.78x = 100,661,910,155.73
  5. Step 5: Solve for x
    x = 100,661,910,155.73/424,165.78
  6. Step 6: Final answer
    x = 237,317.38

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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.