Home / 129,814.50-179,163.45-79,542.66

Finding the Fourth Proportional to 129,814.50, 179,163.45 and 79,542.66

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Solution

The fourth proportional to 129,814.50, 179,163.45 and 79,542.66 is: 109,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,814.50 : 179,163.45 = 79,542.66 : x
  2. Step 2: Convert to fraction form
    129,814.50/179,163.45 = 79,542.66/x
  3. Step 3: Cross multiply
    129,814.50x = 179,163.45 × 79,542.66
  4. Step 4: Simplify right side
    129,814.50x = 14,251,137,387.78
  5. Step 5: Solve for x
    x = 14,251,137,387.78/129,814.50
  6. Step 6: Final answer
    x = 109,780.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.