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Finding the Fourth Proportional to 119.65, 165.04 and 75.91

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Solution

The fourth proportional to 119.65, 165.04 and 75.91 is: 104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.65 : 165.04 = 75.91 : x
  2. Step 2: Convert to fraction form
    119.65/165.04 = 75.91/x
  3. Step 3: Cross multiply
    119.65x = 165.04 × 75.91
  4. Step 4: Simplify right side
    119.65x = 12,528.19
  5. Step 5: Solve for x
    x = 12,528.19/119.65
  6. Step 6: Final answer
    x = 104.71

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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.