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Finding the Fourth Proportional to 65,909.11, 90,963.63 and 40,410.97

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Solution

The fourth proportional to 65,909.11, 90,963.63 and 40,410.97 is: 55,772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,909.11 : 90,963.63 = 40,410.97 : x
  2. Step 2: Convert to fraction form
    65,909.11/90,963.63 = 40,410.97/x
  3. Step 3: Cross multiply
    65,909.11x = 90,963.63 × 40,410.97
  4. Step 4: Simplify right side
    65,909.11x = 3,675,928,523.02
  5. Step 5: Solve for x
    x = 3,675,928,523.02/65,909.11
  6. Step 6: Final answer
    x = 55,772.69

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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.