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Finding the Fourth Proportional to 73.21, 110.23 and 66.93

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Solution

The fourth proportional to 73.21, 110.23 and 66.93 is: 100.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.21 : 110.23 = 66.93 : x
  2. Step 2: Convert to fraction form
    73.21/110.23 = 66.93/x
  3. Step 3: Cross multiply
    73.21x = 110.23 × 66.93
  4. Step 4: Simplify right side
    73.21x = 7,377.69
  5. Step 5: Solve for x
    x = 7,377.69/73.21
  6. Step 6: Final answer
    x = 100.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.