Home / 129,877.75-179,229.53-72,517.96

Finding the Fourth Proportional to 129,877.75, 179,229.53 and 72,517.96

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Solution

The fourth proportional to 129,877.75, 179,229.53 and 72,517.96 is: 100,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,877.75 : 179,229.53 = 72,517.96 : x
  2. Step 2: Convert to fraction form
    129,877.75/179,229.53 = 72,517.96/x
  3. Step 3: Cross multiply
    129,877.75x = 179,229.53 × 72,517.96
  4. Step 4: Simplify right side
    129,877.75x = 12,997,358,991.21
  5. Step 5: Solve for x
    x = 12,997,358,991.21/129,877.75
  6. Step 6: Final answer
    x = 100,073.80

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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.