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Finding the Fourth Proportional to 183.85, 253.70 and 105.19

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Solution

The fourth proportional to 183.85, 253.70 and 105.19 is: 145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.85 : 253.70 = 105.19 : x
  2. Step 2: Convert to fraction form
    183.85/253.70 = 105.19/x
  3. Step 3: Cross multiply
    183.85x = 253.70 × 105.19
  4. Step 4: Simplify right side
    183.85x = 26,686.70
  5. Step 5: Solve for x
    x = 26,686.70/183.85
  6. Step 6: Final answer
    x = 145.15

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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.