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Finding the Fourth Proportional to 73.72, 110.14 and 61.56

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Solution

The fourth proportional to 73.72, 110.14 and 61.56 is: 91.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.72 : 110.14 = 61.56 : x
  2. Step 2: Convert to fraction form
    73.72/110.14 = 61.56/x
  3. Step 3: Cross multiply
    73.72x = 110.14 × 61.56
  4. Step 4: Simplify right side
    73.72x = 6,780.22
  5. Step 5: Solve for x
    x = 6,780.22/73.72
  6. Step 6: Final answer
    x = 91.97

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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.