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Finding the Fourth Proportional to 79,731.30, 119,593.95 and 19,759.95

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Solution

The fourth proportional to 79,731.30, 119,593.95 and 19,759.95 is: 29,639.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,731.30 : 119,593.95 = 19,759.95 : x
  2. Step 2: Convert to fraction form
    79,731.30/119,593.95 = 19,759.95/x
  3. Step 3: Cross multiply
    79,731.30x = 119,593.95 × 19,759.95
  4. Step 4: Simplify right side
    79,731.30x = 2,363,170,472.30
  5. Step 5: Solve for x
    x = 2,363,170,472.30/79,731.30
  6. Step 6: Final answer
    x = 29,639.18

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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.