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Finding the Fourth Proportional to 61,140.60, 91,727.10 and 21,693.60

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Solution

The fourth proportional to 61,140.60, 91,727.10 and 21,693.60 is: 32,546.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,140.60 : 91,727.10 = 21,693.60 : x
  2. Step 2: Convert to fraction form
    61,140.60/91,727.10 = 21,693.60/x
  3. Step 3: Cross multiply
    61,140.60x = 91,727.10 × 21,693.60
  4. Step 4: Simplify right side
    61,140.60x = 1,989,891,016.56
  5. Step 5: Solve for x
    x = 1,989,891,016.56/61,140.60
  6. Step 6: Final answer
    x = 32,546.15

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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.