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Finding the Fourth Proportional to 68.95, 95.06 and 55.18

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Solution

The fourth proportional to 68.95, 95.06 and 55.18 is: 76.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.95 : 95.06 = 55.18 : x
  2. Step 2: Convert to fraction form
    68.95/95.06 = 55.18/x
  3. Step 3: Cross multiply
    68.95x = 95.06 × 55.18
  4. Step 4: Simplify right side
    68.95x = 5,245.31
  5. Step 5: Solve for x
    x = 5,245.31/68.95
  6. Step 6: Final answer
    x = 76.08

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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.