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Finding the Fourth Proportional to 165.86, 248.94 and 84.75

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Solution

The fourth proportional to 165.86, 248.94 and 84.75 is: 127.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.86 : 248.94 = 84.75 : x
  2. Step 2: Convert to fraction form
    165.86/248.94 = 84.75/x
  3. Step 3: Cross multiply
    165.86x = 248.94 × 84.75
  4. Step 4: Simplify right side
    165.86x = 21,097.67
  5. Step 5: Solve for x
    x = 21,097.67/165.86
  6. Step 6: Final answer
    x = 127.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.