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Finding the Fourth Proportional to 183.81, 253.64 and 100.92

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Solution

The fourth proportional to 183.81, 253.64 and 100.92 is: 139.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.81 : 253.64 = 100.92 : x
  2. Step 2: Convert to fraction form
    183.81/253.64 = 100.92/x
  3. Step 3: Cross multiply
    183.81x = 253.64 × 100.92
  4. Step 4: Simplify right side
    183.81x = 25,597.35
  5. Step 5: Solve for x
    x = 25,597.35/183.81
  6. Step 6: Final answer
    x = 139.26

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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.