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Finding the Fourth Proportional to 165.68, 228.55 and 115.81

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Solution

The fourth proportional to 165.68, 228.55 and 115.81 is: 159.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.68 : 228.55 = 115.81 : x
  2. Step 2: Convert to fraction form
    165.68/228.55 = 115.81/x
  3. Step 3: Cross multiply
    165.68x = 228.55 × 115.81
  4. Step 4: Simplify right side
    165.68x = 26,467.80
  5. Step 5: Solve for x
    x = 26,467.80/165.68
  6. Step 6: Final answer
    x = 159.75

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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.