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Finding the Fourth Proportional to 99,079.12, 148,531.20 and 75,809.44

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Solution

The fourth proportional to 99,079.12, 148,531.20 and 75,809.44 is: 113,647.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,079.12 : 148,531.20 = 75,809.44 : x
  2. Step 2: Convert to fraction form
    99,079.12/148,531.20 = 75,809.44/x
  3. Step 3: Cross multiply
    99,079.12x = 148,531.20 × 75,809.44
  4. Step 4: Simplify right side
    99,079.12x = 11,260,067,422.33
  5. Step 5: Solve for x
    x = 11,260,067,422.33/99,079.12
  6. Step 6: Final answer
    x = 113,647.23

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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.