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Finding the Fourth Proportional to 84.24, 116.24 and 51.48

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Solution

The fourth proportional to 84.24, 116.24 and 51.48 is: 71.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.24 : 116.24 = 51.48 : x
  2. Step 2: Convert to fraction form
    84.24/116.24 = 51.48/x
  3. Step 3: Cross multiply
    84.24x = 116.24 × 51.48
  4. Step 4: Simplify right side
    84.24x = 5,983.78
  5. Step 5: Solve for x
    x = 5,983.78/84.24
  6. Step 6: Final answer
    x = 71.03

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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.