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Finding the Fourth Proportional to 125,531, 173,248.14 and 72,539

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Solution

The fourth proportional to 125,531, 173,248.14 and 72,539 is: 100,112.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,531 : 173,248.14 = 72,539 : x
  2. Step 2: Convert to fraction form
    125,531/173,248.14 = 72,539/x
  3. Step 3: Cross multiply
    125,531x = 173,248.14 × 72,539
  4. Step 4: Simplify right side
    125,531x = 12,567,246,827.46
  5. Step 5: Solve for x
    x = 12,567,246,827.46/125,531
  6. Step 6: Final answer
    x = 100,112.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.