Home / 231,354.50-319,266.99-129,378.81

Finding the Fourth Proportional to 231,354.50, 319,266.99 and 129,378.81

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Solution

The fourth proportional to 231,354.50, 319,266.99 and 129,378.81 is: 178,541.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,354.50 : 319,266.99 = 129,378.81 : x
  2. Step 2: Convert to fraction form
    231,354.50/319,266.99 = 129,378.81/x
  3. Step 3: Cross multiply
    231,354.50x = 319,266.99 × 129,378.81
  4. Step 4: Simplify right side
    231,354.50x = 41,306,383,238.48
  5. Step 5: Solve for x
    x = 41,306,383,238.48/231,354.50
  6. Step 6: Final answer
    x = 178,541.51

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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.