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Finding the Fourth Proportional to 65,341.89, 90,157.89 and 38,474.58

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Solution

The fourth proportional to 65,341.89, 90,157.89 and 38,474.58 is: 53,086.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,341.89 : 90,157.89 = 38,474.58 : x
  2. Step 2: Convert to fraction form
    65,341.89/90,157.89 = 38,474.58/x
  3. Step 3: Cross multiply
    65,341.89x = 90,157.89 × 38,474.58
  4. Step 4: Simplify right side
    65,341.89x = 3,468,786,951.44
  5. Step 5: Solve for x
    x = 3,468,786,951.44/65,341.89
  6. Step 6: Final answer
    x = 53,086.73

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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.