Home / 81,820.32-122,732-25,659.18

Finding the Fourth Proportional to 81,820.32, 122,732 and 25,659.18

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Solution

The fourth proportional to 81,820.32, 122,732 and 25,659.18 is: 38,489.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,820.32 : 122,732 = 25,659.18 : x
  2. Step 2: Convert to fraction form
    81,820.32/122,732 = 25,659.18/x
  3. Step 3: Cross multiply
    81,820.32x = 122,732 × 25,659.18
  4. Step 4: Simplify right side
    81,820.32x = 3,149,202,479.76
  5. Step 5: Solve for x
    x = 3,149,202,479.76/81,820.32
  6. Step 6: Final answer
    x = 38,489.25

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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.