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Finding the Fourth Proportional to 80,359.55, 120,540.31 and 55,392.88

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Solution

The fourth proportional to 80,359.55, 120,540.31 and 55,392.88 is: 83,090.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,359.55 : 120,540.31 = 55,392.88 : x
  2. Step 2: Convert to fraction form
    80,359.55/120,540.31 = 55,392.88/x
  3. Step 3: Cross multiply
    80,359.55x = 120,540.31 × 55,392.88
  4. Step 4: Simplify right side
    80,359.55x = 6,677,074,487.16
  5. Step 5: Solve for x
    x = 6,677,074,487.16/80,359.55
  6. Step 6: Final answer
    x = 83,090.00

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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.