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Finding the Fourth Proportional to 107.63, 161.37 and 49.81

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Solution

The fourth proportional to 107.63, 161.37 and 49.81 is: 74.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.63 : 161.37 = 49.81 : x
  2. Step 2: Convert to fraction form
    107.63/161.37 = 49.81/x
  3. Step 3: Cross multiply
    107.63x = 161.37 × 49.81
  4. Step 4: Simplify right side
    107.63x = 8,038.20
  5. Step 5: Solve for x
    x = 8,038.20/107.63
  6. Step 6: Final answer
    x = 74.69

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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.