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Finding the Fourth Proportional to 53.55, 80.36 and 50.86

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Solution

The fourth proportional to 53.55, 80.36 and 50.86 is: 76.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.55 : 80.36 = 50.86 : x
  2. Step 2: Convert to fraction form
    53.55/80.36 = 50.86/x
  3. Step 3: Cross multiply
    53.55x = 80.36 × 50.86
  4. Step 4: Simplify right side
    53.55x = 4,087.11
  5. Step 5: Solve for x
    x = 4,087.11/53.55
  6. Step 6: Final answer
    x = 76.32

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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.