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Finding the Fourth Proportional to 84.96, 127.32 and 67.80

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Solution

The fourth proportional to 84.96, 127.32 and 67.80 is: 101.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.96 : 127.32 = 67.80 : x
  2. Step 2: Convert to fraction form
    84.96/127.32 = 67.80/x
  3. Step 3: Cross multiply
    84.96x = 127.32 × 67.80
  4. Step 4: Simplify right side
    84.96x = 8,632.30
  5. Step 5: Solve for x
    x = 8,632.30/84.96
  6. Step 6: Final answer
    x = 101.60

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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.