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Finding the Fourth Proportional to 79,538.67, 109,764.11 and 43,728.94

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Solution

The fourth proportional to 79,538.67, 109,764.11 and 43,728.94 is: 60,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,538.67 : 109,764.11 = 43,728.94 : x
  2. Step 2: Convert to fraction form
    79,538.67/109,764.11 = 43,728.94/x
  3. Step 3: Cross multiply
    79,538.67x = 109,764.11 × 43,728.94
  4. Step 4: Simplify right side
    79,538.67x = 4,799,867,851.27
  5. Step 5: Solve for x
    x = 4,799,867,851.27/79,538.67
  6. Step 6: Final answer
    x = 60,346.34

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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.