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Finding the Fourth Proportional to 61,129.40, 91,839.90 and 54,714.20

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Solution

The fourth proportional to 61,129.40, 91,839.90 and 54,714.20 is: 82,201.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,129.40 : 91,839.90 = 54,714.20 : x
  2. Step 2: Convert to fraction form
    61,129.40/91,839.90 = 54,714.20/x
  3. Step 3: Cross multiply
    61,129.40x = 91,839.90 × 54,714.20
  4. Step 4: Simplify right side
    61,129.40x = 5,024,946,656.58
  5. Step 5: Solve for x
    x = 5,024,946,656.58/61,129.40
  6. Step 6: Final answer
    x = 82,201.80

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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.