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Finding the Fourth Proportional to 65,761.20, 98,836.20 and 57,207.60

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Solution

The fourth proportional to 65,761.20, 98,836.20 and 57,207.60 is: 85,980.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,761.20 : 98,836.20 = 57,207.60 : x
  2. Step 2: Convert to fraction form
    65,761.20/98,836.20 = 57,207.60/x
  3. Step 3: Cross multiply
    65,761.20x = 98,836.20 × 57,207.60
  4. Step 4: Simplify right side
    65,761.20x = 5,654,181,795.12
  5. Step 5: Solve for x
    x = 5,654,181,795.12/65,761.20
  6. Step 6: Final answer
    x = 85,980.51

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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.