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Finding the Fourth Proportional to 52.12, 72.26 and 49.36

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Solution

The fourth proportional to 52.12, 72.26 and 49.36 is: 68.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.12 : 72.26 = 49.36 : x
  2. Step 2: Convert to fraction form
    52.12/72.26 = 49.36/x
  3. Step 3: Cross multiply
    52.12x = 72.26 × 49.36
  4. Step 4: Simplify right side
    52.12x = 3,566.75
  5. Step 5: Solve for x
    x = 3,566.75/52.12
  6. Step 6: Final answer
    x = 68.43

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.