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Finding the Fourth Proportional to 80,737.49, 121,114.49 and 30,859.57

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Solution

The fourth proportional to 80,737.49, 121,114.49 and 30,859.57 is: 46,292.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,737.49 : 121,114.49 = 30,859.57 : x
  2. Step 2: Convert to fraction form
    80,737.49/121,114.49 = 30,859.57/x
  3. Step 3: Cross multiply
    80,737.49x = 121,114.49 × 30,859.57
  4. Step 4: Simplify right side
    80,737.49x = 3,737,541,082.17
  5. Step 5: Solve for x
    x = 3,737,541,082.17/80,737.49
  6. Step 6: Final answer
    x = 46,292.51

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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.