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Finding the Fourth Proportional to 61.09, 84.32 and 36.54

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Solution

The fourth proportional to 61.09, 84.32 and 36.54 is: 50.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.09 : 84.32 = 36.54 : x
  2. Step 2: Convert to fraction form
    61.09/84.32 = 36.54/x
  3. Step 3: Cross multiply
    61.09x = 84.32 × 36.54
  4. Step 4: Simplify right side
    61.09x = 3,081.14
  5. Step 5: Solve for x
    x = 3,081.14/61.09
  6. Step 6: Final answer
    x = 50.44

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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.