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Finding the Fourth Proportional to 73.37, 109.29 and 71.75

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Solution

The fourth proportional to 73.37, 109.29 and 71.75 is: 106.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.37 : 109.29 = 71.75 : x
  2. Step 2: Convert to fraction form
    73.37/109.29 = 71.75/x
  3. Step 3: Cross multiply
    73.37x = 109.29 × 71.75
  4. Step 4: Simplify right side
    73.37x = 7,841.56
  5. Step 5: Solve for x
    x = 7,841.56/73.37
  6. Step 6: Final answer
    x = 106.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.