Home / 129,899.45-179,195.19-78,898.61

Finding the Fourth Proportional to 129,899.45, 179,195.19 and 78,898.61

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Solution

The fourth proportional to 129,899.45, 179,195.19 and 78,898.61 is: 108,839.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,899.45 : 179,195.19 = 78,898.61 : x
  2. Step 2: Convert to fraction form
    129,899.45/179,195.19 = 78,898.61/x
  3. Step 3: Cross multiply
    129,899.45x = 179,195.19 × 78,898.61
  4. Step 4: Simplify right side
    129,899.45x = 14,138,250,513.71
  5. Step 5: Solve for x
    x = 14,138,250,513.71/129,899.45
  6. Step 6: Final answer
    x = 108,839.96

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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.