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Finding the Fourth Proportional to 52.36, 72.15 and 48.85

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Solution

The fourth proportional to 52.36, 72.15 and 48.85 is: 67.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.36 : 72.15 = 48.85 : x
  2. Step 2: Convert to fraction form
    52.36/72.15 = 48.85/x
  3. Step 3: Cross multiply
    52.36x = 72.15 × 48.85
  4. Step 4: Simplify right side
    52.36x = 3,524.53
  5. Step 5: Solve for x
    x = 3,524.53/52.36
  6. Step 6: Final answer
    x = 67.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.