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Finding the Fourth Proportional to 80,770.60, 121,169.76 and 30,855.16

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Solution

The fourth proportional to 80,770.60, 121,169.76 and 30,855.16 is: 46,288.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,770.60 : 121,169.76 = 30,855.16 : x
  2. Step 2: Convert to fraction form
    80,770.60/121,169.76 = 30,855.16/x
  3. Step 3: Cross multiply
    80,770.60x = 121,169.76 × 30,855.16
  4. Step 4: Simplify right side
    80,770.60x = 3,738,712,331.96
  5. Step 5: Solve for x
    x = 3,738,712,331.96/80,770.60
  6. Step 6: Final answer
    x = 46,288.03

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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.