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Finding the Fourth Proportional to 91.93, 137.94 and 49.18

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Solution

The fourth proportional to 91.93, 137.94 and 49.18 is: 73.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.93 : 137.94 = 49.18 : x
  2. Step 2: Convert to fraction form
    91.93/137.94 = 49.18/x
  3. Step 3: Cross multiply
    91.93x = 137.94 × 49.18
  4. Step 4: Simplify right side
    91.93x = 6,783.89
  5. Step 5: Solve for x
    x = 6,783.89/91.93
  6. Step 6: Final answer
    x = 73.79

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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.