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Finding the Fourth Proportional to 80,039.78, 120,055.33 and 40,595.87

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Solution

The fourth proportional to 80,039.78, 120,055.33 and 40,595.87 is: 60,891.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,039.78 : 120,055.33 = 40,595.87 : x
  2. Step 2: Convert to fraction form
    80,039.78/120,055.33 = 40,595.87/x
  3. Step 3: Cross multiply
    80,039.78x = 120,055.33 × 40,595.87
  4. Step 4: Simplify right side
    80,039.78x = 4,873,750,569.49
  5. Step 5: Solve for x
    x = 4,873,750,569.49/80,039.78
  6. Step 6: Final answer
    x = 60,891.60

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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.