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Finding the Fourth Proportional to 73.27, 109.79 and 40.74

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Solution

The fourth proportional to 73.27, 109.79 and 40.74 is: 61.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.27 : 109.79 = 40.74 : x
  2. Step 2: Convert to fraction form
    73.27/109.79 = 40.74/x
  3. Step 3: Cross multiply
    73.27x = 109.79 × 40.74
  4. Step 4: Simplify right side
    73.27x = 4,472.84
  5. Step 5: Solve for x
    x = 4,472.84/73.27
  6. Step 6: Final answer
    x = 61.05

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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.