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Finding the Fourth Proportional to 73.55, 110.13 and 71.38

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Solution

The fourth proportional to 73.55, 110.13 and 71.38 is: 106.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.55 : 110.13 = 71.38 : x
  2. Step 2: Convert to fraction form
    73.55/110.13 = 71.38/x
  3. Step 3: Cross multiply
    73.55x = 110.13 × 71.38
  4. Step 4: Simplify right side
    73.55x = 7,861.49
  5. Step 5: Solve for x
    x = 7,861.49/73.55
  6. Step 6: Final answer
    x = 106.89

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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.