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Finding the Fourth Proportional to 71,874.64, 99,190.02 and 40,043.50

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Solution

The fourth proportional to 71,874.64, 99,190.02 and 40,043.50 is: 55,261.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,874.64 : 99,190.02 = 40,043.50 : x
  2. Step 2: Convert to fraction form
    71,874.64/99,190.02 = 40,043.50/x
  3. Step 3: Cross multiply
    71,874.64x = 99,190.02 × 40,043.50
  4. Step 4: Simplify right side
    71,874.64x = 3,971,915,565.87
  5. Step 5: Solve for x
    x = 3,971,915,565.87/71,874.64
  6. Step 6: Final answer
    x = 55,261.71

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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.