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Finding the Fourth Proportional to 61,122.60, 91,700.10 and 21,675.60

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Solution

The fourth proportional to 61,122.60, 91,700.10 and 21,675.60 is: 32,519.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,122.60 : 91,700.10 = 21,675.60 : x
  2. Step 2: Convert to fraction form
    61,122.60/91,700.10 = 21,675.60/x
  3. Step 3: Cross multiply
    61,122.60x = 91,700.10 × 21,675.60
  4. Step 4: Simplify right side
    61,122.60x = 1,987,654,687.56
  5. Step 5: Solve for x
    x = 1,987,654,687.56/61,122.60
  6. Step 6: Final answer
    x = 32,519.14

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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.