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Finding the Fourth Proportional to 70.45, 105.75 and 50.18

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Solution

The fourth proportional to 70.45, 105.75 and 50.18 is: 75.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.45 : 105.75 = 50.18 : x
  2. Step 2: Convert to fraction form
    70.45/105.75 = 50.18/x
  3. Step 3: Cross multiply
    70.45x = 105.75 × 50.18
  4. Step 4: Simplify right side
    70.45x = 5,306.01
  5. Step 5: Solve for x
    x = 5,306.01/70.45
  6. Step 6: Final answer
    x = 75.32

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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.