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Finding the Fourth Proportional to 66,488.68, 91,753.44 and 38,194.60

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Solution

The fourth proportional to 66,488.68, 91,753.44 and 38,194.60 is: 52,708.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.68 : 91,753.44 = 38,194.60 : x
  2. Step 2: Convert to fraction form
    66,488.68/91,753.44 = 38,194.60/x
  3. Step 3: Cross multiply
    66,488.68x = 91,753.44 × 38,194.60
  4. Step 4: Simplify right side
    66,488.68x = 3,504,485,939.42
  5. Step 5: Solve for x
    x = 3,504,485,939.42/66,488.68
  6. Step 6: Final answer
    x = 52,708.01

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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.