Home / 231,371.29-319,275.30-128,000.98

Finding the Fourth Proportional to 231,371.29, 319,275.30 and 128,000.98

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Solution

The fourth proportional to 231,371.29, 319,275.30 and 128,000.98 is: 176,631.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,371.29 : 319,275.30 = 128,000.98 : x
  2. Step 2: Convert to fraction form
    231,371.29/319,275.30 = 128,000.98/x
  3. Step 3: Cross multiply
    231,371.29x = 319,275.30 × 128,000.98
  4. Step 4: Simplify right side
    231,371.29x = 40,867,551,289.79
  5. Step 5: Solve for x
    x = 40,867,551,289.79/231,371.29
  6. Step 6: Final answer
    x = 176,631.90

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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.