Home / 129,569.10-178,798.13-71,423.96

Finding the Fourth Proportional to 129,569.10, 178,798.13 and 71,423.96

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Solution

The fourth proportional to 129,569.10, 178,798.13 and 71,423.96 is: 98,561.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,569.10 : 178,798.13 = 71,423.96 : x
  2. Step 2: Convert to fraction form
    129,569.10/178,798.13 = 71,423.96/x
  3. Step 3: Cross multiply
    129,569.10x = 178,798.13 × 71,423.96
  4. Step 4: Simplify right side
    129,569.10x = 12,770,469,234.08
  5. Step 5: Solve for x
    x = 12,770,469,234.08/129,569.10
  6. Step 6: Final answer
    x = 98,561.07

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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.