Home / 81,439.32-122,153.19-25,278.09

Finding the Fourth Proportional to 81,439.32, 122,153.19 and 25,278.09

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Solution

The fourth proportional to 81,439.32, 122,153.19 and 25,278.09 is: 37,915.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,439.32 : 122,153.19 = 25,278.09 : x
  2. Step 2: Convert to fraction form
    81,439.32/122,153.19 = 25,278.09/x
  3. Step 3: Cross multiply
    81,439.32x = 122,153.19 × 25,278.09
  4. Step 4: Simplify right side
    81,439.32x = 3,087,799,330.61
  5. Step 5: Solve for x
    x = 3,087,799,330.61/81,439.32
  6. Step 6: Final answer
    x = 37,915.34

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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.