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Finding the Fourth Proportional to 79.18, 118.96 and 56.42

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Solution

The fourth proportional to 79.18, 118.96 and 56.42 is: 84.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.18 : 118.96 = 56.42 : x
  2. Step 2: Convert to fraction form
    79.18/118.96 = 56.42/x
  3. Step 3: Cross multiply
    79.18x = 118.96 × 56.42
  4. Step 4: Simplify right side
    79.18x = 6,711.72
  5. Step 5: Solve for x
    x = 6,711.72/79.18
  6. Step 6: Final answer
    x = 84.77

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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.