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Finding the Fourth Proportional to 76.34, 105.36 and 43.60

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Solution

The fourth proportional to 76.34, 105.36 and 43.60 is: 60.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.34 : 105.36 = 43.60 : x
  2. Step 2: Convert to fraction form
    76.34/105.36 = 43.60/x
  3. Step 3: Cross multiply
    76.34x = 105.36 × 43.60
  4. Step 4: Simplify right side
    76.34x = 4,593.70
  5. Step 5: Solve for x
    x = 4,593.70/76.34
  6. Step 6: Final answer
    x = 60.17

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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.