Home / 80,939.40-121,409.10-49,446.60

Finding the Fourth Proportional to 80,939.40, 121,409.10 and 49,446.60

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Solution

The fourth proportional to 80,939.40, 121,409.10 and 49,446.60 is: 74,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,939.40 : 121,409.10 = 49,446.60 : x
  2. Step 2: Convert to fraction form
    80,939.40/121,409.10 = 49,446.60/x
  3. Step 3: Cross multiply
    80,939.40x = 121,409.10 × 49,446.60
  4. Step 4: Simplify right side
    80,939.40x = 6,003,267,204.06
  5. Step 5: Solve for x
    x = 6,003,267,204.06/80,939.40
  6. Step 6: Final answer
    x = 74,169.90

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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.