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Finding the Fourth Proportional to 52.18, 78.12 and 34.09

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Solution

The fourth proportional to 52.18, 78.12 and 34.09 is: 51.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.18 : 78.12 = 34.09 : x
  2. Step 2: Convert to fraction form
    52.18/78.12 = 34.09/x
  3. Step 3: Cross multiply
    52.18x = 78.12 × 34.09
  4. Step 4: Simplify right side
    52.18x = 2,663.11
  5. Step 5: Solve for x
    x = 2,663.11/52.18
  6. Step 6: Final answer
    x = 51.04

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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.