Home / 80,214.78-120,286.63-42,767.87

Finding the Fourth Proportional to 80,214.78, 120,286.63 and 42,767.87

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Solution

The fourth proportional to 80,214.78, 120,286.63 and 42,767.87 is: 64,132.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,214.78 : 120,286.63 = 42,767.87 : x
  2. Step 2: Convert to fraction form
    80,214.78/120,286.63 = 42,767.87/x
  3. Step 3: Cross multiply
    80,214.78x = 120,286.63 × 42,767.87
  4. Step 4: Simplify right side
    80,214.78x = 5,144,403,148.37
  5. Step 5: Solve for x
    x = 5,144,403,148.37/80,214.78
  6. Step 6: Final answer
    x = 64,132.86

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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.