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Finding the Fourth Proportional to 72,408.76, 108,612.92 and 18,373.34

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Solution

The fourth proportional to 72,408.76, 108,612.92 and 18,373.34 is: 27,559.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,408.76 : 108,612.92 = 18,373.34 : x
  2. Step 2: Convert to fraction form
    72,408.76/108,612.92 = 18,373.34/x
  3. Step 3: Cross multiply
    72,408.76x = 108,612.92 × 18,373.34
  4. Step 4: Simplify right side
    72,408.76x = 1,995,582,107.55
  5. Step 5: Solve for x
    x = 1,995,582,107.55/72,408.76
  6. Step 6: Final answer
    x = 27,559.95

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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.