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Finding the Fourth Proportional to 69.61, 96.04 and 47.74

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Solution

The fourth proportional to 69.61, 96.04 and 47.74 is: 65.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.61 : 96.04 = 47.74 : x
  2. Step 2: Convert to fraction form
    69.61/96.04 = 47.74/x
  3. Step 3: Cross multiply
    69.61x = 96.04 × 47.74
  4. Step 4: Simplify right side
    69.61x = 4,584.95
  5. Step 5: Solve for x
    x = 4,584.95/69.61
  6. Step 6: Final answer
    x = 65.87

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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.