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Finding the Fourth Proportional to 123,910.40, 185,865.60 and 79,587.20

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Solution

The fourth proportional to 123,910.40, 185,865.60 and 79,587.20 is: 119,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,910.40 : 185,865.60 = 79,587.20 : x
  2. Step 2: Convert to fraction form
    123,910.40/185,865.60 = 79,587.20/x
  3. Step 3: Cross multiply
    123,910.40x = 185,865.60 × 79,587.20
  4. Step 4: Simplify right side
    123,910.40x = 14,792,522,680.32
  5. Step 5: Solve for x
    x = 14,792,522,680.32/123,910.40
  6. Step 6: Final answer
    x = 119,380.80

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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.