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Finding the Fourth Proportional to 107.10, 160.99 and 66.77

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Solution

The fourth proportional to 107.10, 160.99 and 66.77 is: 100.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.10 : 160.99 = 66.77 : x
  2. Step 2: Convert to fraction form
    107.10/160.99 = 66.77/x
  3. Step 3: Cross multiply
    107.10x = 160.99 × 66.77
  4. Step 4: Simplify right side
    107.10x = 10,749.84
  5. Step 5: Solve for x
    x = 10,749.84/107.10
  6. Step 6: Final answer
    x = 100.37

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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.