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Finding the Fourth Proportional to 68.97, 95.08 and 56.66

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Solution

The fourth proportional to 68.97, 95.08 and 56.66 is: 78.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.97 : 95.08 = 56.66 : x
  2. Step 2: Convert to fraction form
    68.97/95.08 = 56.66/x
  3. Step 3: Cross multiply
    68.97x = 95.08 × 56.66
  4. Step 4: Simplify right side
    68.97x = 5,387.23
  5. Step 5: Solve for x
    x = 5,387.23/68.97
  6. Step 6: Final answer
    x = 78.11

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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.