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Finding the Fourth Proportional to 61.75, 85.10 and 61.37

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Solution

The fourth proportional to 61.75, 85.10 and 61.37 is: 84.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.75 : 85.10 = 61.37 : x
  2. Step 2: Convert to fraction form
    61.75/85.10 = 61.37/x
  3. Step 3: Cross multiply
    61.75x = 85.10 × 61.37
  4. Step 4: Simplify right side
    61.75x = 5,222.59
  5. Step 5: Solve for x
    x = 5,222.59/61.75
  6. Step 6: Final answer
    x = 84.58

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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.