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Finding the Fourth Proportional to 125,393.68, 173,043.28 and 71,679.88

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Solution

The fourth proportional to 125,393.68, 173,043.28 and 71,679.88 is: 98,918.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,393.68 : 173,043.28 = 71,679.88 : x
  2. Step 2: Convert to fraction form
    125,393.68/173,043.28 = 71,679.88/x
  3. Step 3: Cross multiply
    125,393.68x = 173,043.28 × 71,679.88
  4. Step 4: Simplify right side
    125,393.68x = 12,403,721,545.21
  5. Step 5: Solve for x
    x = 12,403,721,545.21/125,393.68
  6. Step 6: Final answer
    x = 98,918.24

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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.