Home / 231,366.90-319,284.06-129,391.20

Finding the Fourth Proportional to 231,366.90, 319,284.06 and 129,391.20

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Solution

The fourth proportional to 231,366.90, 319,284.06 and 129,391.20 is: 178,558.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,366.90 : 319,284.06 = 129,391.20 : x
  2. Step 2: Convert to fraction form
    231,366.90/319,284.06 = 129,391.20/x
  3. Step 3: Cross multiply
    231,366.90x = 319,284.06 × 129,391.20
  4. Step 4: Simplify right side
    231,366.90x = 41,312,547,664.27
  5. Step 5: Solve for x
    x = 41,312,547,664.27/231,366.90
  6. Step 6: Final answer
    x = 178,558.59

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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.