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Finding the Fourth Proportional to 92.06, 137.58 and 74.76

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Solution

The fourth proportional to 92.06, 137.58 and 74.76 is: 111.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.06 : 137.58 = 74.76 : x
  2. Step 2: Convert to fraction form
    92.06/137.58 = 74.76/x
  3. Step 3: Cross multiply
    92.06x = 137.58 × 74.76
  4. Step 4: Simplify right side
    92.06x = 10,285.48
  5. Step 5: Solve for x
    x = 10,285.48/92.06
  6. Step 6: Final answer
    x = 111.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.