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Finding the Fourth Proportional to 39.61, 59.09 and 36.57

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Solution

The fourth proportional to 39.61, 59.09 and 36.57 is: 54.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.61 : 59.09 = 36.57 : x
  2. Step 2: Convert to fraction form
    39.61/59.09 = 36.57/x
  3. Step 3: Cross multiply
    39.61x = 59.09 × 36.57
  4. Step 4: Simplify right side
    39.61x = 2,160.92
  5. Step 5: Solve for x
    x = 2,160.92/39.61
  6. Step 6: Final answer
    x = 54.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.