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Finding the Fourth Proportional to 72,506.28, 108,760.38 and 28,135.56

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Solution

The fourth proportional to 72,506.28, 108,760.38 and 28,135.56 is: 42,203.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,506.28 : 108,760.38 = 28,135.56 : x
  2. Step 2: Convert to fraction form
    72,506.28/108,760.38 = 28,135.56/x
  3. Step 3: Cross multiply
    72,506.28x = 108,760.38 × 28,135.56
  4. Step 4: Simplify right side
    72,506.28x = 3,060,034,197.11
  5. Step 5: Solve for x
    x = 3,060,034,197.11/72,506.28
  6. Step 6: Final answer
    x = 42,203.71

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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.