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Finding the Fourth Proportional to 81,691.85, 122,537.87 and 25,532.25

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Solution

The fourth proportional to 81,691.85, 122,537.87 and 25,532.25 is: 38,298.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,691.85 : 122,537.87 = 25,532.25 : x
  2. Step 2: Convert to fraction form
    81,691.85/122,537.87 = 25,532.25/x
  3. Step 3: Cross multiply
    81,691.85x = 122,537.87 × 25,532.25
  4. Step 4: Simplify right side
    81,691.85x = 3,128,668,054.66
  5. Step 5: Solve for x
    x = 3,128,668,054.66/81,691.85
  6. Step 6: Final answer
    x = 38,298.41

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1.5x scale

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.