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Finding the Fourth Proportional to 98,892.80, 136,469.76 and 54,179.84

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Solution

The fourth proportional to 98,892.80, 136,469.76 and 54,179.84 is: 74,766.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,892.80 : 136,469.76 = 54,179.84 : x
  2. Step 2: Convert to fraction form
    98,892.80/136,469.76 = 54,179.84/x
  3. Step 3: Cross multiply
    98,892.80x = 136,469.76 × 54,179.84
  4. Step 4: Simplify right side
    98,892.80x = 7,393,909,761.64
  5. Step 5: Solve for x
    x = 7,393,909,761.64/98,892.80
  6. Step 6: Final answer
    x = 74,766.92

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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.