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Finding the Fourth Proportional to 183.80, 253.65 and 105.09

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Solution

The fourth proportional to 183.80, 253.65 and 105.09 is: 145.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.80 : 253.65 = 105.09 : x
  2. Step 2: Convert to fraction form
    183.80/253.65 = 105.09/x
  3. Step 3: Cross multiply
    183.80x = 253.65 × 105.09
  4. Step 4: Simplify right side
    183.80x = 26,655.44
  5. Step 5: Solve for x
    x = 26,655.44/183.80
  6. Step 6: Final answer
    x = 145.02

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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.