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Finding the Fourth Proportional to 50.31, 75.60 and 36.81

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Solution

The fourth proportional to 50.31, 75.60 and 36.81 is: 55.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.31 : 75.60 = 36.81 : x
  2. Step 2: Convert to fraction form
    50.31/75.60 = 36.81/x
  3. Step 3: Cross multiply
    50.31x = 75.60 × 36.81
  4. Step 4: Simplify right side
    50.31x = 2,782.84
  5. Step 5: Solve for x
    x = 2,782.84/50.31
  6. Step 6: Final answer
    x = 55.31

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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.