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Finding the Fourth Proportional to 160.13, 239.91 and 68.78

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Solution

The fourth proportional to 160.13, 239.91 and 68.78 is: 103.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.13 : 239.91 = 68.78 : x
  2. Step 2: Convert to fraction form
    160.13/239.91 = 68.78/x
  3. Step 3: Cross multiply
    160.13x = 239.91 × 68.78
  4. Step 4: Simplify right side
    160.13x = 16,499.81
  5. Step 5: Solve for x
    x = 16,499.81/160.13
  6. Step 6: Final answer
    x = 103.04

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.