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Finding the Fourth Proportional to 123,722.56, 170,736.36 and 67,132.72

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Solution

The fourth proportional to 123,722.56, 170,736.36 and 67,132.72 is: 92,642.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,722.56 : 170,736.36 = 67,132.72 : x
  2. Step 2: Convert to fraction form
    123,722.56/170,736.36 = 67,132.72/x
  3. Step 3: Cross multiply
    123,722.56x = 170,736.36 × 67,132.72
  4. Step 4: Simplify right side
    123,722.56x = 11,461,996,249.70
  5. Step 5: Solve for x
    x = 11,461,996,249.70/123,722.56
  6. Step 6: Final answer
    x = 92,642.73

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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.