Home / 81,040.20-121,546.17-36,656.55

Finding the Fourth Proportional to 81,040.20, 121,546.17 and 36,656.55

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Solution

The fourth proportional to 81,040.20, 121,546.17 and 36,656.55 is: 54,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,040.20 : 121,546.17 = 36,656.55 : x
  2. Step 2: Convert to fraction form
    81,040.20/121,546.17 = 36,656.55/x
  3. Step 3: Cross multiply
    81,040.20x = 121,546.17 × 36,656.55
  4. Step 4: Simplify right side
    81,040.20x = 4,455,463,257.91
  5. Step 5: Solve for x
    x = 4,455,463,257.91/81,040.20
  6. Step 6: Final answer
    x = 54,978.44

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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.