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Finding the Fourth Proportional to 61,388.96, 84,691.68 and 38,720.24

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Solution

The fourth proportional to 61,388.96, 84,691.68 and 38,720.24 is: 53,418.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,388.96 : 84,691.68 = 38,720.24 : x
  2. Step 2: Convert to fraction form
    61,388.96/84,691.68 = 38,720.24/x
  3. Step 3: Cross multiply
    61,388.96x = 84,691.68 × 38,720.24
  4. Step 4: Simplify right side
    61,388.96x = 3,279,282,175.60
  5. Step 5: Solve for x
    x = 3,279,282,175.60/61,388.96
  6. Step 6: Final answer
    x = 53,418.11

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1.5x scale

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.