Home / 231,445.78-319,380.10-129,453.55

Finding the Fourth Proportional to 231,445.78, 319,380.10 and 129,453.55

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Solution

The fourth proportional to 231,445.78, 319,380.10 and 129,453.55 is: 178,637.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,445.78 : 319,380.10 = 129,453.55 : x
  2. Step 2: Convert to fraction form
    231,445.78/319,380.10 = 129,453.55/x
  3. Step 3: Cross multiply
    231,445.78x = 319,380.10 × 129,453.55
  4. Step 4: Simplify right side
    231,445.78x = 41,344,888,542.81
  5. Step 5: Solve for x
    x = 41,344,888,542.81/231,445.78
  6. Step 6: Final answer
    x = 178,637.47

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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.