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Finding the Fourth Proportional to 91,170.80, 125,827.08 and 55,358.48

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Solution

The fourth proportional to 91,170.80, 125,827.08 and 55,358.48 is: 76,401.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,170.80 : 125,827.08 = 55,358.48 : x
  2. Step 2: Convert to fraction form
    91,170.80/125,827.08 = 55,358.48/x
  3. Step 3: Cross multiply
    91,170.80x = 125,827.08 × 55,358.48
  4. Step 4: Simplify right side
    91,170.80x = 6,965,595,891.64
  5. Step 5: Solve for x
    x = 6,965,595,891.64/91,170.80
  6. Step 6: Final answer
    x = 76,401.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.