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Finding the Fourth Proportional to 61.66, 85.10 and 35.44

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Solution

The fourth proportional to 61.66, 85.10 and 35.44 is: 48.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.66 : 85.10 = 35.44 : x
  2. Step 2: Convert to fraction form
    61.66/85.10 = 35.44/x
  3. Step 3: Cross multiply
    61.66x = 85.10 × 35.44
  4. Step 4: Simplify right side
    61.66x = 3,015.75
  5. Step 5: Solve for x
    x = 3,015.75/61.66
  6. Step 6: Final answer
    x = 48.91

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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.