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Finding the Fourth Proportional to 50.28, 75.12 and 45.18

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Solution

The fourth proportional to 50.28, 75.12 and 45.18 is: 67.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.28 : 75.12 = 45.18 : x
  2. Step 2: Convert to fraction form
    50.28/75.12 = 45.18/x
  3. Step 3: Cross multiply
    50.28x = 75.12 × 45.18
  4. Step 4: Simplify right side
    50.28x = 3,393.92
  5. Step 5: Solve for x
    x = 3,393.92/50.28
  6. Step 6: Final answer
    x = 67.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.