Home / 231,255.95-319,135.58-129,287.07

Finding the Fourth Proportional to 231,255.95, 319,135.58 and 129,287.07

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Solution

The fourth proportional to 231,255.95, 319,135.58 and 129,287.07 is: 178,417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,255.95 : 319,135.58 = 129,287.07 : x
  2. Step 2: Convert to fraction form
    231,255.95/319,135.58 = 129,287.07/x
  3. Step 3: Cross multiply
    231,255.95x = 319,135.58 × 129,287.07
  4. Step 4: Simplify right side
    231,255.95x = 41,260,104,070.95
  5. Step 5: Solve for x
    x = 41,260,104,070.95/231,255.95
  6. Step 6: Final answer
    x = 178,417.48

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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.