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Finding the Fourth Proportional to 61,108.75, 91,613.85 and 21,644.34

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Solution

The fourth proportional to 61,108.75, 91,613.85 and 21,644.34 is: 32,449.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,108.75 : 91,613.85 = 21,644.34 : x
  2. Step 2: Convert to fraction form
    61,108.75/91,613.85 = 21,644.34/x
  3. Step 3: Cross multiply
    61,108.75x = 91,613.85 × 21,644.34
  4. Step 4: Simplify right side
    61,108.75x = 1,982,921,318.11
  5. Step 5: Solve for x
    x = 1,982,921,318.11/61,108.75
  6. Step 6: Final answer
    x = 32,449.06

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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.