Home / 80,917.43-121,439.71-56,131.89

Finding the Fourth Proportional to 80,917.43, 121,439.71 and 56,131.89

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Solution

The fourth proportional to 80,917.43, 121,439.71 and 56,131.89 is: 84,241.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,917.43 : 121,439.71 = 56,131.89 : x
  2. Step 2: Convert to fraction form
    80,917.43/121,439.71 = 56,131.89/x
  3. Step 3: Cross multiply
    80,917.43x = 121,439.71 × 56,131.89
  4. Step 4: Simplify right side
    80,917.43x = 6,816,639,742.38
  5. Step 5: Solve for x
    x = 6,816,639,742.38/80,917.43
  6. Step 6: Final answer
    x = 84,241.92

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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.