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Finding the Fourth Proportional to 65,474.85, 90,367.07 and 38,615.79

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Solution

The fourth proportional to 65,474.85, 90,367.07 and 38,615.79 is: 53,296.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,474.85 : 90,367.07 = 38,615.79 : x
  2. Step 2: Convert to fraction form
    65,474.85/90,367.07 = 38,615.79/x
  3. Step 3: Cross multiply
    65,474.85x = 90,367.07 × 38,615.79
  4. Step 4: Simplify right side
    65,474.85x = 3,489,595,604.96
  5. Step 5: Solve for x
    x = 3,489,595,604.96/65,474.85
  6. Step 6: Final answer
    x = 53,296.73

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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.