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Finding the Fourth Proportional to 119.83, 165.31 and 90.27

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Solution

The fourth proportional to 119.83, 165.31 and 90.27 is: 124.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.83 : 165.31 = 90.27 : x
  2. Step 2: Convert to fraction form
    119.83/165.31 = 90.27/x
  3. Step 3: Cross multiply
    119.83x = 165.31 × 90.27
  4. Step 4: Simplify right side
    119.83x = 14,922.53
  5. Step 5: Solve for x
    x = 14,922.53/119.83
  6. Step 6: Final answer
    x = 124.53

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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.