Home / 129,145.27-178,223.76-71,001.29

Finding the Fourth Proportional to 129,145.27, 178,223.76 and 71,001.29

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Solution

The fourth proportional to 129,145.27, 178,223.76 and 71,001.29 is: 97,983.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,145.27 : 178,223.76 = 71,001.29 : x
  2. Step 2: Convert to fraction form
    129,145.27/178,223.76 = 71,001.29/x
  3. Step 3: Cross multiply
    129,145.27x = 178,223.76 × 71,001.29
  4. Step 4: Simplify right side
    129,145.27x = 12,654,116,868.65
  5. Step 5: Solve for x
    x = 12,654,116,868.65/129,145.27
  6. Step 6: Final answer
    x = 97,983.59

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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.