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Finding the Fourth Proportional to 183.36, 253.02 and 105.72

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Solution

The fourth proportional to 183.36, 253.02 and 105.72 is: 145.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.36 : 253.02 = 105.72 : x
  2. Step 2: Convert to fraction form
    183.36/253.02 = 105.72/x
  3. Step 3: Cross multiply
    183.36x = 253.02 × 105.72
  4. Step 4: Simplify right side
    183.36x = 26,749.27
  5. Step 5: Solve for x
    x = 26,749.27/183.36
  6. Step 6: Final answer
    x = 145.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.