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Finding the Fourth Proportional to 80,911.80, 121,302.90 and 34,126.20

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Solution

The fourth proportional to 80,911.80, 121,302.90 and 34,126.20 is: 51,161.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.80 : 121,302.90 = 34,126.20 : x
  2. Step 2: Convert to fraction form
    80,911.80/121,302.90 = 34,126.20/x
  3. Step 3: Cross multiply
    80,911.80x = 121,302.90 × 34,126.20
  4. Step 4: Simplify right side
    80,911.80x = 4,139,607,025.98
  5. Step 5: Solve for x
    x = 4,139,607,025.98/80,911.80
  6. Step 6: Final answer
    x = 51,161.97

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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.