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Finding the Fourth Proportional to 61.13, 84.36 and 36.56

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Solution

The fourth proportional to 61.13, 84.36 and 36.56 is: 50.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.13 : 84.36 = 36.56 : x
  2. Step 2: Convert to fraction form
    61.13/84.36 = 36.56/x
  3. Step 3: Cross multiply
    61.13x = 84.36 × 36.56
  4. Step 4: Simplify right side
    61.13x = 3,083.78
  5. Step 5: Solve for x
    x = 3,083.78/61.13
  6. Step 6: Final answer
    x = 50.45

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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.