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Finding the Fourth Proportional to 68.75, 94.84 and 63.57

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Solution

The fourth proportional to 68.75, 94.84 and 63.57 is: 87.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.75 : 94.84 = 63.57 : x
  2. Step 2: Convert to fraction form
    68.75/94.84 = 63.57/x
  3. Step 3: Cross multiply
    68.75x = 94.84 × 63.57
  4. Step 4: Simplify right side
    68.75x = 6,028.66
  5. Step 5: Solve for x
    x = 6,028.66/68.75
  6. Step 6: Final answer
    x = 87.69

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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.