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Finding the Fourth Proportional to 61.10, 92.12 and 56.85

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Solution

The fourth proportional to 61.10, 92.12 and 56.85 is: 85.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.10 : 92.12 = 56.85 : x
  2. Step 2: Convert to fraction form
    61.10/92.12 = 56.85/x
  3. Step 3: Cross multiply
    61.10x = 92.12 × 56.85
  4. Step 4: Simplify right side
    61.10x = 5,237.02
  5. Step 5: Solve for x
    x = 5,237.02/61.10
  6. Step 6: Final answer
    x = 85.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.