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Finding the Fourth Proportional to 123,680.40, 185,301.90 and 104,872.20

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Solution

The fourth proportional to 123,680.40, 185,301.90 and 104,872.20 is: 157,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,680.40 : 185,301.90 = 104,872.20 : x
  2. Step 2: Convert to fraction form
    123,680.40/185,301.90 = 104,872.20/x
  3. Step 3: Cross multiply
    123,680.40x = 185,301.90 × 104,872.20
  4. Step 4: Simplify right side
    123,680.40x = 19,433,017,917.18
  5. Step 5: Solve for x
    x = 19,433,017,917.18/123,680.40
  6. Step 6: Final answer
    x = 157,122.86

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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.