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Finding the Fourth Proportional to 92.09, 138.06 and 48.71

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Solution

The fourth proportional to 92.09, 138.06 and 48.71 is: 73.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.09 : 138.06 = 48.71 : x
  2. Step 2: Convert to fraction form
    92.09/138.06 = 48.71/x
  3. Step 3: Cross multiply
    92.09x = 138.06 × 48.71
  4. Step 4: Simplify right side
    92.09x = 6,724.21
  5. Step 5: Solve for x
    x = 6,724.21/92.09
  6. Step 6: Final answer
    x = 73.02

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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.