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Finding the Fourth Proportional to 50.20, 75.18 and 45.91

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Solution

The fourth proportional to 50.20, 75.18 and 45.91 is: 68.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.20 : 75.18 = 45.91 : x
  2. Step 2: Convert to fraction form
    50.20/75.18 = 45.91/x
  3. Step 3: Cross multiply
    50.20x = 75.18 × 45.91
  4. Step 4: Simplify right side
    50.20x = 3,451.51
  5. Step 5: Solve for x
    x = 3,451.51/50.20
  6. Step 6: Final answer
    x = 68.76

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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.