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Finding the Fourth Proportional to 76.26, 114.33 and 47.40

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Solution

The fourth proportional to 76.26, 114.33 and 47.40 is: 71.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.26 : 114.33 = 47.40 : x
  2. Step 2: Convert to fraction form
    76.26/114.33 = 47.40/x
  3. Step 3: Cross multiply
    76.26x = 114.33 × 47.40
  4. Step 4: Simplify right side
    76.26x = 5,419.24
  5. Step 5: Solve for x
    x = 5,419.24/76.26
  6. Step 6: Final answer
    x = 71.06

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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.