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Finding the Fourth Proportional to 71,422.44, 98,565.84 and 39,590.64

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Solution

The fourth proportional to 71,422.44, 98,565.84 and 39,590.64 is: 54,636.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,422.44 : 98,565.84 = 39,590.64 : x
  2. Step 2: Convert to fraction form
    71,422.44/98,565.84 = 39,590.64/x
  3. Step 3: Cross multiply
    71,422.44x = 98,565.84 × 39,590.64
  4. Step 4: Simplify right side
    71,422.44x = 3,902,284,687.74
  5. Step 5: Solve for x
    x = 3,902,284,687.74/71,422.44
  6. Step 6: Final answer
    x = 54,636.68

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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.