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Finding the Fourth Proportional to 69, 95.04 and 66.57

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Solution

The fourth proportional to 69, 95.04 and 66.57 is: 91.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69 : 95.04 = 66.57 : x
  2. Step 2: Convert to fraction form
    69/95.04 = 66.57/x
  3. Step 3: Cross multiply
    69x = 95.04 × 66.57
  4. Step 4: Simplify right side
    69x = 6,326.81
  5. Step 5: Solve for x
    x = 6,326.81/69
  6. Step 6: Final answer
    x = 91.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.