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Finding the Fourth Proportional to 165.86, 248.81 and 57.63

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Solution

The fourth proportional to 165.86, 248.81 and 57.63 is: 86.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.86 : 248.81 = 57.63 : x
  2. Step 2: Convert to fraction form
    165.86/248.81 = 57.63/x
  3. Step 3: Cross multiply
    165.86x = 248.81 × 57.63
  4. Step 4: Simplify right side
    165.86x = 14,338.63
  5. Step 5: Solve for x
    x = 14,338.63/165.86
  6. Step 6: Final answer
    x = 86.45

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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.