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Finding the Fourth Proportional to 73,311.68, 109,957.80 and 20,725.28

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Solution

The fourth proportional to 73,311.68, 109,957.80 and 20,725.28 is: 31,085.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,311.68 : 109,957.80 = 20,725.28 : x
  2. Step 2: Convert to fraction form
    73,311.68/109,957.80 = 20,725.28/x
  3. Step 3: Cross multiply
    73,311.68x = 109,957.80 × 20,725.28
  4. Step 4: Simplify right side
    73,311.68x = 2,278,906,193.18
  5. Step 5: Solve for x
    x = 2,278,906,193.18/73,311.68
  6. Step 6: Final answer
    x = 31,085.17

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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.