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Finding the Fourth Proportional to 129,614.80, 193,983.12 and 79,726.56

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Solution

The fourth proportional to 129,614.80, 193,983.12 and 79,726.56 is: 119,319.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,614.80 : 193,983.12 = 79,726.56 : x
  2. Step 2: Convert to fraction form
    129,614.80/193,983.12 = 79,726.56/x
  3. Step 3: Cross multiply
    129,614.80x = 193,983.12 × 79,726.56
  4. Step 4: Simplify right side
    129,614.80x = 15,465,606,855.67
  5. Step 5: Solve for x
    x = 15,465,606,855.67/129,614.80
  6. Step 6: Final answer
    x = 119,319.76

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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.