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Finding the Fourth Proportional to 79.82, 119.48 and 55.70

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Solution

The fourth proportional to 79.82, 119.48 and 55.70 is: 83.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.82 : 119.48 = 55.70 : x
  2. Step 2: Convert to fraction form
    79.82/119.48 = 55.70/x
  3. Step 3: Cross multiply
    79.82x = 119.48 × 55.70
  4. Step 4: Simplify right side
    79.82x = 6,654.16
  5. Step 5: Solve for x
    x = 6,654.16/79.82
  6. Step 6: Final answer
    x = 83.37

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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.