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Finding the Fourth Proportional to 76.39, 114.59 and 61.95

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Solution

The fourth proportional to 76.39, 114.59 and 61.95 is: 92.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.39 : 114.59 = 61.95 : x
  2. Step 2: Convert to fraction form
    76.39/114.59 = 61.95/x
  3. Step 3: Cross multiply
    76.39x = 114.59 × 61.95
  4. Step 4: Simplify right side
    76.39x = 7,098.85
  5. Step 5: Solve for x
    x = 7,098.85/76.39
  6. Step 6: Final answer
    x = 92.93

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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.