Home / 81,691.28-122,537.02-25,531.69

Finding the Fourth Proportional to 81,691.28, 122,537.02 and 25,531.69

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Solution

The fourth proportional to 81,691.28, 122,537.02 and 25,531.69 is: 38,297.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,691.28 : 122,537.02 = 25,531.69 : x
  2. Step 2: Convert to fraction form
    81,691.28/122,537.02 = 25,531.69/x
  3. Step 3: Cross multiply
    81,691.28x = 122,537.02 × 25,531.69
  4. Step 4: Simplify right side
    81,691.28x = 3,128,576,941.29
  5. Step 5: Solve for x
    x = 3,128,576,941.29/81,691.28
  6. Step 6: Final answer
    x = 38,297.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.