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Finding the Fourth Proportional to 61.85, 84.95 and 50.14

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Solution

The fourth proportional to 61.85, 84.95 and 50.14 is: 68.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.85 : 84.95 = 50.14 : x
  2. Step 2: Convert to fraction form
    61.85/84.95 = 50.14/x
  3. Step 3: Cross multiply
    61.85x = 84.95 × 50.14
  4. Step 4: Simplify right side
    61.85x = 4,259.31
  5. Step 5: Solve for x
    x = 4,259.31/61.85
  6. Step 6: Final answer
    x = 68.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.