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Finding the Fourth Proportional to 81,092.64, 111,780.72 and 74,575.32

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Solution

The fourth proportional to 81,092.64, 111,780.72 and 74,575.32 is: 102,797.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,092.64 : 111,780.72 = 74,575.32 : x
  2. Step 2: Convert to fraction form
    81,092.64/111,780.72 = 74,575.32/x
  3. Step 3: Cross multiply
    81,092.64x = 111,780.72 × 74,575.32
  4. Step 4: Simplify right side
    81,092.64x = 8,336,082,963.83
  5. Step 5: Solve for x
    x = 8,336,082,963.83/81,092.64
  6. Step 6: Final answer
    x = 102,797.04

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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.