Home / 231,541.11-319,543.89-129,576.78

Finding the Fourth Proportional to 231,541.11, 319,543.89 and 129,576.78

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Solution

The fourth proportional to 231,541.11, 319,543.89 and 129,576.78 is: 178,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,541.11 : 319,543.89 = 129,576.78 : x
  2. Step 2: Convert to fraction form
    231,541.11/319,543.89 = 129,576.78/x
  3. Step 3: Cross multiply
    231,541.11x = 319,543.89 × 129,576.78
  4. Step 4: Simplify right side
    231,541.11x = 41,405,468,334.87
  5. Step 5: Solve for x
    x = 41,405,468,334.87/231,541.11
  6. Step 6: Final answer
    x = 178,825.56

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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.