Home / 80,724.57-121,161.67-40,771.61

Finding the Fourth Proportional to 80,724.57, 121,161.67 and 40,771.61

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Solution

The fourth proportional to 80,724.57, 121,161.67 and 40,771.61 is: 61,195.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,724.57 : 121,161.67 = 40,771.61 : x
  2. Step 2: Convert to fraction form
    80,724.57/121,161.67 = 40,771.61/x
  3. Step 3: Cross multiply
    80,724.57x = 121,161.67 × 40,771.61
  4. Step 4: Simplify right side
    80,724.57x = 4,939,955,951.36
  5. Step 5: Solve for x
    x = 4,939,955,951.36/80,724.57
  6. Step 6: Final answer
    x = 61,195.20

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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.