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Finding the Fourth Proportional to 66.73, 100.01 and 34.21

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Solution

The fourth proportional to 66.73, 100.01 and 34.21 is: 51.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.73 : 100.01 = 34.21 : x
  2. Step 2: Convert to fraction form
    66.73/100.01 = 34.21/x
  3. Step 3: Cross multiply
    66.73x = 100.01 × 34.21
  4. Step 4: Simplify right side
    66.73x = 3,421.34
  5. Step 5: Solve for x
    x = 3,421.34/66.73
  6. Step 6: Final answer
    x = 51.27

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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.