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Finding the Fourth Proportional to 80,338.80, 120,637.80 and 54,159.60

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Solution

The fourth proportional to 80,338.80, 120,637.80 and 54,159.60 is: 81,326.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,338.80 : 120,637.80 = 54,159.60 : x
  2. Step 2: Convert to fraction form
    80,338.80/120,637.80 = 54,159.60/x
  3. Step 3: Cross multiply
    80,338.80x = 120,637.80 × 54,159.60
  4. Step 4: Simplify right side
    80,338.80x = 6,533,694,992.88
  5. Step 5: Solve for x
    x = 6,533,694,992.88/80,338.80
  6. Step 6: Final answer
    x = 81,326.77

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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.