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Finding the Fourth Proportional to 61.45, 84.79 and 36.88

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Solution

The fourth proportional to 61.45, 84.79 and 36.88 is: 50.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.45 : 84.79 = 36.88 : x
  2. Step 2: Convert to fraction form
    61.45/84.79 = 36.88/x
  3. Step 3: Cross multiply
    61.45x = 84.79 × 36.88
  4. Step 4: Simplify right side
    61.45x = 3,127.06
  5. Step 5: Solve for x
    x = 3,127.06/61.45
  6. Step 6: Final answer
    x = 50.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.