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Finding the Fourth Proportional to 92.58, 138.90 and 49.23

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Solution

The fourth proportional to 92.58, 138.90 and 49.23 is: 73.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.58 : 138.90 = 49.23 : x
  2. Step 2: Convert to fraction form
    92.58/138.90 = 49.23/x
  3. Step 3: Cross multiply
    92.58x = 138.90 × 49.23
  4. Step 4: Simplify right side
    92.58x = 6,838.05
  5. Step 5: Solve for x
    x = 6,838.05/92.58
  6. Step 6: Final answer
    x = 73.86

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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.