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Finding the Fourth Proportional to 80,847.70, 121,091.13 and 61,988.92

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Solution

The fourth proportional to 80,847.70, 121,091.13 and 61,988.92 is: 92,845.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,847.70 : 121,091.13 = 61,988.92 : x
  2. Step 2: Convert to fraction form
    80,847.70/121,091.13 = 61,988.92/x
  3. Step 3: Cross multiply
    80,847.70x = 121,091.13 × 61,988.92
  4. Step 4: Simplify right side
    80,847.70x = 7,506,308,370.28
  5. Step 5: Solve for x
    x = 7,506,308,370.28/80,847.70
  6. Step 6: Final answer
    x = 92,845.05

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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.