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Finding the Fourth Proportional to 66,195.20, 99,177.60 and 42,809.60

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Solution

The fourth proportional to 66,195.20, 99,177.60 and 42,809.60 is: 64,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,195.20 : 99,177.60 = 42,809.60 : x
  2. Step 2: Convert to fraction form
    66,195.20/99,177.60 = 42,809.60/x
  3. Step 3: Cross multiply
    66,195.20x = 99,177.60 × 42,809.60
  4. Step 4: Simplify right side
    66,195.20x = 4,245,753,384.96
  5. Step 5: Solve for x
    x = 4,245,753,384.96/66,195.20
  6. Step 6: Final answer
    x = 64,139.90

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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.