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Finding the Fourth Proportional to 50.54, 75.68 and 42.92

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Solution

The fourth proportional to 50.54, 75.68 and 42.92 is: 64.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.54 : 75.68 = 42.92 : x
  2. Step 2: Convert to fraction form
    50.54/75.68 = 42.92/x
  3. Step 3: Cross multiply
    50.54x = 75.68 × 42.92
  4. Step 4: Simplify right side
    50.54x = 3,248.19
  5. Step 5: Solve for x
    x = 3,248.19/50.54
  6. Step 6: Final answer
    x = 64.27

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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.