Home / 231,712.38-319,688.78-129,722.85

Finding the Fourth Proportional to 231,712.38, 319,688.78 and 129,722.85

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Solution

The fourth proportional to 231,712.38, 319,688.78 and 129,722.85 is: 178,975.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,712.38 : 319,688.78 = 129,722.85 : x
  2. Step 2: Convert to fraction form
    231,712.38/319,688.78 = 129,722.85/x
  3. Step 3: Cross multiply
    231,712.38x = 319,688.78 × 129,722.85
  4. Step 4: Simplify right side
    231,712.38x = 41,470,939,006.01
  5. Step 5: Solve for x
    x = 41,470,939,006.01/231,712.38
  6. Step 6: Final answer
    x = 178,975.93

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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.