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Finding the Fourth Proportional to 92.81, 139.07 and 41.40

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Solution

The fourth proportional to 92.81, 139.07 and 41.40 is: 62.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.81 : 139.07 = 41.40 : x
  2. Step 2: Convert to fraction form
    92.81/139.07 = 41.40/x
  3. Step 3: Cross multiply
    92.81x = 139.07 × 41.40
  4. Step 4: Simplify right side
    92.81x = 5,757.50
  5. Step 5: Solve for x
    x = 5,757.50/92.81
  6. Step 6: Final answer
    x = 62.04

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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.