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Finding the Fourth Proportional to 125,721.60, 173,452.64 and 77,957.76

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Solution

The fourth proportional to 125,721.60, 173,452.64 and 77,957.76 is: 107,554.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,721.60 : 173,452.64 = 77,957.76 : x
  2. Step 2: Convert to fraction form
    125,721.60/173,452.64 = 77,957.76/x
  3. Step 3: Cross multiply
    125,721.60x = 173,452.64 × 77,957.76
  4. Step 4: Simplify right side
    125,721.60x = 13,521,979,280.49
  5. Step 5: Solve for x
    x = 13,521,979,280.49/125,721.60
  6. Step 6: Final answer
    x = 107,554.94

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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.