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Finding the Fourth Proportional to 43,791.72, 65,712.59 and 17,139.89

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Solution

The fourth proportional to 43,791.72, 65,712.59 and 17,139.89 is: 25,719.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,791.72 : 65,712.59 = 17,139.89 : x
  2. Step 2: Convert to fraction form
    43,791.72/65,712.59 = 17,139.89/x
  3. Step 3: Cross multiply
    43,791.72x = 65,712.59 × 17,139.89
  4. Step 4: Simplify right side
    43,791.72x = 1,126,306,564.22
  5. Step 5: Solve for x
    x = 1,126,306,564.22/43,791.72
  6. Step 6: Final answer
    x = 25,719.62

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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.