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Finding the Fourth Proportional to 43,840.28, 65,760.42 and 40,691

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Solution

The fourth proportional to 43,840.28, 65,760.42 and 40,691 is: 61,036.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,840.28 : 65,760.42 = 40,691 : x
  2. Step 2: Convert to fraction form
    43,840.28/65,760.42 = 40,691/x
  3. Step 3: Cross multiply
    43,840.28x = 65,760.42 × 40,691
  4. Step 4: Simplify right side
    43,840.28x = 2,675,857,250.22
  5. Step 5: Solve for x
    x = 2,675,857,250.22/43,840.28
  6. Step 6: Final answer
    x = 61,036.50

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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.