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Finding the Fourth Proportional to 39.87, 60.12 and 36.51

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Solution

The fourth proportional to 39.87, 60.12 and 36.51 is: 55.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.87 : 60.12 = 36.51 : x
  2. Step 2: Convert to fraction form
    39.87/60.12 = 36.51/x
  3. Step 3: Cross multiply
    39.87x = 60.12 × 36.51
  4. Step 4: Simplify right side
    39.87x = 2,194.98
  5. Step 5: Solve for x
    x = 2,194.98/39.87
  6. Step 6: Final answer
    x = 55.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.