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Finding the Fourth Proportional to 65,969.27, 90,987.78 and 41,447.21

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Solution

The fourth proportional to 65,969.27, 90,987.78 and 41,447.21 is: 57,165.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,969.27 : 90,987.78 = 41,447.21 : x
  2. Step 2: Convert to fraction form
    65,969.27/90,987.78 = 41,447.21/x
  3. Step 3: Cross multiply
    65,969.27x = 90,987.78 × 41,447.21
  4. Step 4: Simplify right side
    65,969.27x = 3,771,189,625.09
  5. Step 5: Solve for x
    x = 3,771,189,625.09/65,969.27
  6. Step 6: Final answer
    x = 57,165.85

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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.