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Finding the Fourth Proportional to 125,791.52, 173,578.20 and 72,061.88

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Solution

The fourth proportional to 125,791.52, 173,578.20 and 72,061.88 is: 99,437.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,791.52 : 173,578.20 = 72,061.88 : x
  2. Step 2: Convert to fraction form
    125,791.52/173,578.20 = 72,061.88/x
  3. Step 3: Cross multiply
    125,791.52x = 173,578.20 × 72,061.88
  4. Step 4: Simplify right side
    125,791.52x = 12,508,371,419.02
  5. Step 5: Solve for x
    x = 12,508,371,419.02/125,791.52
  6. Step 6: Final answer
    x = 99,437.32

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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.