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Finding the Fourth Proportional to 52.11, 78.09 and 36.87

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Solution

The fourth proportional to 52.11, 78.09 and 36.87 is: 55.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.11 : 78.09 = 36.87 : x
  2. Step 2: Convert to fraction form
    52.11/78.09 = 36.87/x
  3. Step 3: Cross multiply
    52.11x = 78.09 × 36.87
  4. Step 4: Simplify right side
    52.11x = 2,879.18
  5. Step 5: Solve for x
    x = 2,879.18/52.11
  6. Step 6: Final answer
    x = 55.25

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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.