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Finding the Fourth Proportional to 83,907.60, 125,569.80 and 76,909.20

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Solution

The fourth proportional to 83,907.60, 125,569.80 and 76,909.20 is: 115,096.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,907.60 : 125,569.80 = 76,909.20 : x
  2. Step 2: Convert to fraction form
    83,907.60/125,569.80 = 76,909.20/x
  3. Step 3: Cross multiply
    83,907.60x = 125,569.80 × 76,909.20
  4. Step 4: Simplify right side
    83,907.60x = 9,657,472,862.16
  5. Step 5: Solve for x
    x = 9,657,472,862.16/83,907.60
  6. Step 6: Final answer
    x = 115,096.52

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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.