Home / 231,165.90-319,002.60-129,191.79

Finding the Fourth Proportional to 231,165.90, 319,002.60 and 129,191.79

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Solution

The fourth proportional to 231,165.90, 319,002.60 and 129,191.79 is: 178,281.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,165.90 : 319,002.60 = 129,191.79 : x
  2. Step 2: Convert to fraction form
    231,165.90/319,002.60 = 129,191.79/x
  3. Step 3: Cross multiply
    231,165.90x = 319,002.60 × 129,191.79
  4. Step 4: Simplify right side
    231,165.90x = 41,212,516,908.65
  5. Step 5: Solve for x
    x = 41,212,516,908.65/231,165.90
  6. Step 6: Final answer
    x = 178,281.13

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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.