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Finding the Fourth Proportional to 68.52, 94.62 and 63.66

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Solution

The fourth proportional to 68.52, 94.62 and 63.66 is: 87.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.52 : 94.62 = 63.66 : x
  2. Step 2: Convert to fraction form
    68.52/94.62 = 63.66/x
  3. Step 3: Cross multiply
    68.52x = 94.62 × 63.66
  4. Step 4: Simplify right side
    68.52x = 6,023.51
  5. Step 5: Solve for x
    x = 6,023.51/68.52
  6. Step 6: Final answer
    x = 87.91

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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.