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Finding the Fourth Proportional to 76.01, 114.06 and 69.89

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Solution

The fourth proportional to 76.01, 114.06 and 69.89 is: 104.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.01 : 114.06 = 69.89 : x
  2. Step 2: Convert to fraction form
    76.01/114.06 = 69.89/x
  3. Step 3: Cross multiply
    76.01x = 114.06 × 69.89
  4. Step 4: Simplify right side
    76.01x = 7,971.65
  5. Step 5: Solve for x
    x = 7,971.65/76.01
  6. Step 6: Final answer
    x = 104.88

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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.