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Finding the Fourth Proportional to 68.95, 95.66 and 63.55

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Solution

The fourth proportional to 68.95, 95.66 and 63.55 is: 88.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.95 : 95.66 = 63.55 : x
  2. Step 2: Convert to fraction form
    68.95/95.66 = 63.55/x
  3. Step 3: Cross multiply
    68.95x = 95.66 × 63.55
  4. Step 4: Simplify right side
    68.95x = 6,079.19
  5. Step 5: Solve for x
    x = 6,079.19/68.95
  6. Step 6: Final answer
    x = 88.17

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.