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Finding the Fourth Proportional to 50.83, 76.61 and 47.89

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Solution

The fourth proportional to 50.83, 76.61 and 47.89 is: 72.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.83 : 76.61 = 47.89 : x
  2. Step 2: Convert to fraction form
    50.83/76.61 = 47.89/x
  3. Step 3: Cross multiply
    50.83x = 76.61 × 47.89
  4. Step 4: Simplify right side
    50.83x = 3,668.85
  5. Step 5: Solve for x
    x = 3,668.85/50.83
  6. Step 6: Final answer
    x = 72.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.