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Finding the Fourth Proportional to 80,806.80, 121,210.05 and 36,381.64

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Solution

The fourth proportional to 80,806.80, 121,210.05 and 36,381.64 is: 54,572.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,806.80 : 121,210.05 = 36,381.64 : x
  2. Step 2: Convert to fraction form
    80,806.80/121,210.05 = 36,381.64/x
  3. Step 3: Cross multiply
    80,806.80x = 121,210.05 × 36,381.64
  4. Step 4: Simplify right side
    80,806.80x = 4,409,820,403.48
  5. Step 5: Solve for x
    x = 4,409,820,403.48/80,806.80
  6. Step 6: Final answer
    x = 54,572.39

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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.