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Finding the Fourth Proportional to 80,716.80, 121,118.40 and 36,350.40

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Solution

The fourth proportional to 80,716.80, 121,118.40 and 36,350.40 is: 54,545.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,716.80 : 121,118.40 = 36,350.40 : x
  2. Step 2: Convert to fraction form
    80,716.80/121,118.40 = 36,350.40/x
  3. Step 3: Cross multiply
    80,716.80x = 121,118.40 × 36,350.40
  4. Step 4: Simplify right side
    80,716.80x = 4,402,702,287.36
  5. Step 5: Solve for x
    x = 4,402,702,287.36/80,716.80
  6. Step 6: Final answer
    x = 54,545.05

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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.