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Finding the Fourth Proportional to 183.45, 253.20 and 109.78

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Solution

The fourth proportional to 183.45, 253.20 and 109.78 is: 151.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.45 : 253.20 = 109.78 : x
  2. Step 2: Convert to fraction form
    183.45/253.20 = 109.78/x
  3. Step 3: Cross multiply
    183.45x = 253.20 × 109.78
  4. Step 4: Simplify right side
    183.45x = 27,796.81
  5. Step 5: Solve for x
    x = 27,796.81/183.45
  6. Step 6: Final answer
    x = 151.52

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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.