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Finding the Fourth Proportional to 92.85, 139.20 and 41.43

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Solution

The fourth proportional to 92.85, 139.20 and 41.43 is: 62.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.85 : 139.20 = 41.43 : x
  2. Step 2: Convert to fraction form
    92.85/139.20 = 41.43/x
  3. Step 3: Cross multiply
    92.85x = 139.20 × 41.43
  4. Step 4: Simplify right side
    92.85x = 5,767.06
  5. Step 5: Solve for x
    x = 5,767.06/92.85
  6. Step 6: Final answer
    x = 62.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.