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Finding the Fourth Proportional to 80,172.68, 120,301.68 and 45,114.80

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Solution

The fourth proportional to 80,172.68, 120,301.68 and 45,114.80 is: 67,696.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,172.68 : 120,301.68 = 45,114.80 : x
  2. Step 2: Convert to fraction form
    80,172.68/120,301.68 = 45,114.80/x
  3. Step 3: Cross multiply
    80,172.68x = 120,301.68 × 45,114.80
  4. Step 4: Simplify right side
    80,172.68x = 5,427,386,232.86
  5. Step 5: Solve for x
    x = 5,427,386,232.86/80,172.68
  6. Step 6: Final answer
    x = 67,696.21

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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.