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Finding the Fourth Proportional to 183.57, 275.35 and 61.81

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Solution

The fourth proportional to 183.57, 275.35 and 61.81 is: 92.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.57 : 275.35 = 61.81 : x
  2. Step 2: Convert to fraction form
    183.57/275.35 = 61.81/x
  3. Step 3: Cross multiply
    183.57x = 275.35 × 61.81
  4. Step 4: Simplify right side
    183.57x = 17,020.21
  5. Step 5: Solve for x
    x = 17,020.21/183.57
  6. Step 6: Final answer
    x = 92.72

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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.