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Finding the Fourth Proportional to 50.71, 75.71 and 42.61

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Solution

The fourth proportional to 50.71, 75.71 and 42.61 is: 63.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.71 : 75.71 = 42.61 : x
  2. Step 2: Convert to fraction form
    50.71/75.71 = 42.61/x
  3. Step 3: Cross multiply
    50.71x = 75.71 × 42.61
  4. Step 4: Simplify right side
    50.71x = 3,226.00
  5. Step 5: Solve for x
    x = 3,226.00/50.71
  6. Step 6: Final answer
    x = 63.62

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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.