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Finding the Fourth Proportional to 107.99, 162.08 and 53.91

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Solution

The fourth proportional to 107.99, 162.08 and 53.91 is: 80.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.99 : 162.08 = 53.91 : x
  2. Step 2: Convert to fraction form
    107.99/162.08 = 53.91/x
  3. Step 3: Cross multiply
    107.99x = 162.08 × 53.91
  4. Step 4: Simplify right side
    107.99x = 8,737.46
  5. Step 5: Solve for x
    x = 8,737.46/107.99
  6. Step 6: Final answer
    x = 80.91

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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.