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Finding the Fourth Proportional to 72,704.10, 109,063.35 and 25,311.90

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Solution

The fourth proportional to 72,704.10, 109,063.35 and 25,311.90 is: 37,970.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,704.10 : 109,063.35 = 25,311.90 : x
  2. Step 2: Convert to fraction form
    72,704.10/109,063.35 = 25,311.90/x
  3. Step 3: Cross multiply
    72,704.10x = 109,063.35 × 25,311.90
  4. Step 4: Simplify right side
    72,704.10x = 2,760,600,608.87
  5. Step 5: Solve for x
    x = 2,760,600,608.87/72,704.10
  6. Step 6: Final answer
    x = 37,970.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.