Home / 81,129.25-111,989.16-61,044.52

Finding the Fourth Proportional to 81,129.25, 111,989.16 and 61,044.52

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Solution

The fourth proportional to 81,129.25, 111,989.16 and 61,044.52 is: 84,264.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129.25 : 111,989.16 = 61,044.52 : x
  2. Step 2: Convert to fraction form
    81,129.25/111,989.16 = 61,044.52/x
  3. Step 3: Cross multiply
    81,129.25x = 111,989.16 × 61,044.52
  4. Step 4: Simplify right side
    81,129.25x = 6,836,324,517.40
  5. Step 5: Solve for x
    x = 6,836,324,517.40/81,129.25
  6. Step 6: Final answer
    x = 84,264.61

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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.