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Finding the Fourth Proportional to 79.71, 119.36 and 52.57

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Solution

The fourth proportional to 79.71, 119.36 and 52.57 is: 78.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.71 : 119.36 = 52.57 : x
  2. Step 2: Convert to fraction form
    79.71/119.36 = 52.57/x
  3. Step 3: Cross multiply
    79.71x = 119.36 × 52.57
  4. Step 4: Simplify right side
    79.71x = 6,274.49
  5. Step 5: Solve for x
    x = 6,274.49/79.71
  6. Step 6: Final answer
    x = 78.72

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Why These Related Problems?

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