Home / 129,210.43-178,310.55-71,849.12

Finding the Fourth Proportional to 129,210.43, 178,310.55 and 71,849.12

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Solution

The fourth proportional to 129,210.43, 178,310.55 and 71,849.12 is: 99,151.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,210.43 : 178,310.55 = 71,849.12 : x
  2. Step 2: Convert to fraction form
    129,210.43/178,310.55 = 71,849.12/x
  3. Step 3: Cross multiply
    129,210.43x = 178,310.55 × 71,849.12
  4. Step 4: Simplify right side
    129,210.43x = 12,811,456,258.68
  5. Step 5: Solve for x
    x = 12,811,456,258.68/129,210.43
  6. Step 6: Final answer
    x = 99,151.88

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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.