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Finding the Fourth Proportional to 66.33, 99.62 and 39.26

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Solution

The fourth proportional to 66.33, 99.62 and 39.26 is: 58.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.33 : 99.62 = 39.26 : x
  2. Step 2: Convert to fraction form
    66.33/99.62 = 39.26/x
  3. Step 3: Cross multiply
    66.33x = 99.62 × 39.26
  4. Step 4: Simplify right side
    66.33x = 3,911.08
  5. Step 5: Solve for x
    x = 3,911.08/66.33
  6. Step 6: Final answer
    x = 58.96

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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.