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Finding the Fourth Proportional to 72.68, 108.93 and 36.62

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Solution

The fourth proportional to 72.68, 108.93 and 36.62 is: 54.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.68 : 108.93 = 36.62 : x
  2. Step 2: Convert to fraction form
    72.68/108.93 = 36.62/x
  3. Step 3: Cross multiply
    72.68x = 108.93 × 36.62
  4. Step 4: Simplify right side
    72.68x = 3,989.02
  5. Step 5: Solve for x
    x = 3,989.02/72.68
  6. Step 6: Final answer
    x = 54.88

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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.