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Finding the Fourth Proportional to 68.90, 95.09 and 45.55

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Solution

The fourth proportional to 68.90, 95.09 and 45.55 is: 62.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.90 : 95.09 = 45.55 : x
  2. Step 2: Convert to fraction form
    68.90/95.09 = 45.55/x
  3. Step 3: Cross multiply
    68.90x = 95.09 × 45.55
  4. Step 4: Simplify right side
    68.90x = 4,331.56
  5. Step 5: Solve for x
    x = 4,331.56/68.90
  6. Step 6: Final answer
    x = 62.86

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.