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Finding the Fourth Proportional to 123,721.60, 185,571.60 and 40,615.60

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Solution

The fourth proportional to 123,721.60, 185,571.60 and 40,615.60 is: 60,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,721.60 : 185,571.60 = 40,615.60 : x
  2. Step 2: Convert to fraction form
    123,721.60/185,571.60 = 40,615.60/x
  3. Step 3: Cross multiply
    123,721.60x = 185,571.60 × 40,615.60
  4. Step 4: Simplify right side
    123,721.60x = 7,537,101,876.96
  5. Step 5: Solve for x
    x = 7,537,101,876.96/123,721.60
  6. Step 6: Final answer
    x = 60,919.85

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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.