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Finding the Fourth Proportional to 72,871.75, 109,339.40 and 25,520.81

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Solution

The fourth proportional to 72,871.75, 109,339.40 and 25,520.81 is: 38,292.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,871.75 : 109,339.40 = 25,520.81 : x
  2. Step 2: Convert to fraction form
    72,871.75/109,339.40 = 25,520.81/x
  3. Step 3: Cross multiply
    72,871.75x = 109,339.40 × 25,520.81
  4. Step 4: Simplify right side
    72,871.75x = 2,790,430,198.66
  5. Step 5: Solve for x
    x = 2,790,430,198.66/72,871.75
  6. Step 6: Final answer
    x = 38,292.34

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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.