Home / 231,448.64-319,415.20-129,507.68

Finding the Fourth Proportional to 231,448.64, 319,415.20 and 129,507.68

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Solution

The fourth proportional to 231,448.64, 319,415.20 and 129,507.68 is: 178,729.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,448.64 : 319,415.20 = 129,507.68 : x
  2. Step 2: Convert to fraction form
    231,448.64/319,415.20 = 129,507.68/x
  3. Step 3: Cross multiply
    231,448.64x = 319,415.20 × 129,507.68
  4. Step 4: Simplify right side
    231,448.64x = 41,366,721,508.74
  5. Step 5: Solve for x
    x = 41,366,721,508.74/231,448.64
  6. Step 6: Final answer
    x = 178,729.59

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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.