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Finding the Fourth Proportional to 120,915.20, 166,837.20 and 73,159.04

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Solution

The fourth proportional to 120,915.20, 166,837.20 and 73,159.04 is: 100,943.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915.20 : 166,837.20 = 73,159.04 : x
  2. Step 2: Convert to fraction form
    120,915.20/166,837.20 = 73,159.04/x
  3. Step 3: Cross multiply
    120,915.20x = 166,837.20 × 73,159.04
  4. Step 4: Simplify right side
    120,915.20x = 12,205,649,388.29
  5. Step 5: Solve for x
    x = 12,205,649,388.29/120,915.20
  6. Step 6: Final answer
    x = 100,943.88

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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.