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Finding the Fourth Proportional to 98,793.90, 147,972.15 and 81,297.90

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Solution

The fourth proportional to 98,793.90, 147,972.15 and 81,297.90 is: 121,766.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,793.90 : 147,972.15 = 81,297.90 : x
  2. Step 2: Convert to fraction form
    98,793.90/147,972.15 = 81,297.90/x
  3. Step 3: Cross multiply
    98,793.90x = 147,972.15 × 81,297.90
  4. Step 4: Simplify right side
    98,793.90x = 12,029,825,053.49
  5. Step 5: Solve for x
    x = 12,029,825,053.49/98,793.90
  6. Step 6: Final answer
    x = 121,766.88

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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.