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Finding the Fourth Proportional to 83,915.80, 125,942.55 and 83,259.70

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Solution

The fourth proportional to 83,915.80, 125,942.55 and 83,259.70 is: 124,957.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,915.80 : 125,942.55 = 83,259.70 : x
  2. Step 2: Convert to fraction form
    83,915.80/125,942.55 = 83,259.70/x
  3. Step 3: Cross multiply
    83,915.80x = 125,942.55 × 83,259.70
  4. Step 4: Simplify right side
    83,915.80x = 10,485,938,930.24
  5. Step 5: Solve for x
    x = 10,485,938,930.24/83,915.80
  6. Step 6: Final answer
    x = 124,957.86

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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.