Home / 129,046.65-178,086.66-71,691.18

Finding the Fourth Proportional to 129,046.65, 178,086.66 and 71,691.18

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Solution

The fourth proportional to 129,046.65, 178,086.66 and 71,691.18 is: 98,935.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,046.65 : 178,086.66 = 71,691.18 : x
  2. Step 2: Convert to fraction form
    129,046.65/178,086.66 = 71,691.18/x
  3. Step 3: Cross multiply
    129,046.65x = 178,086.66 × 71,691.18
  4. Step 4: Simplify right side
    129,046.65x = 12,767,242,797.66
  5. Step 5: Solve for x
    x = 12,767,242,797.66/129,046.65
  6. Step 6: Final answer
    x = 98,935.10

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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.