Home / 129,105.13-178,198.92-72,534.73

Finding the Fourth Proportional to 129,105.13, 178,198.92 and 72,534.73

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Solution

The fourth proportional to 129,105.13, 178,198.92 and 72,534.73 is: 100,116.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,105.13 : 178,198.92 = 72,534.73 : x
  2. Step 2: Convert to fraction form
    129,105.13/178,198.92 = 72,534.73/x
  3. Step 3: Cross multiply
    129,105.13x = 178,198.92 × 72,534.73
  4. Step 4: Simplify right side
    129,105.13x = 12,925,610,185.82
  5. Step 5: Solve for x
    x = 12,925,610,185.82/129,105.13
  6. Step 6: Final answer
    x = 100,116.94

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1.5x scale

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.