Home / 80,278.90-120,435.26-30,357.89

Finding the Fourth Proportional to 80,278.90, 120,435.26 and 30,357.89

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Solution

The fourth proportional to 80,278.90, 120,435.26 and 30,357.89 is: 45,543.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,278.90 : 120,435.26 = 30,357.89 : x
  2. Step 2: Convert to fraction form
    80,278.90/120,435.26 = 30,357.89/x
  3. Step 3: Cross multiply
    80,278.90x = 120,435.26 × 30,357.89
  4. Step 4: Simplify right side
    80,278.90x = 3,656,160,072.87
  5. Step 5: Solve for x
    x = 3,656,160,072.87/80,278.90
  6. Step 6: Final answer
    x = 45,543.23

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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.