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Finding the Fourth Proportional to 68.81, 94.99 and 45.50

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Solution

The fourth proportional to 68.81, 94.99 and 45.50 is: 62.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.81 : 94.99 = 45.50 : x
  2. Step 2: Convert to fraction form
    68.81/94.99 = 45.50/x
  3. Step 3: Cross multiply
    68.81x = 94.99 × 45.50
  4. Step 4: Simplify right side
    68.81x = 4,321.46
  5. Step 5: Solve for x
    x = 4,321.46/68.81
  6. Step 6: Final answer
    x = 62.80

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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.