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Finding the Fourth Proportional to 80,896.20, 121,052.70 and 54,652.20

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Solution

The fourth proportional to 80,896.20, 121,052.70 and 54,652.20 is: 81,781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,896.20 : 121,052.70 = 54,652.20 : x
  2. Step 2: Convert to fraction form
    80,896.20/121,052.70 = 54,652.20/x
  3. Step 3: Cross multiply
    80,896.20x = 121,052.70 × 54,652.20
  4. Step 4: Simplify right side
    80,896.20x = 6,615,796,370.94
  5. Step 5: Solve for x
    x = 6,615,796,370.94/80,896.20
  6. Step 6: Final answer
    x = 81,781.30

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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.