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Finding the Fourth Proportional to 106.10, 146.18 and 79.83

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Solution

The fourth proportional to 106.10, 146.18 and 79.83 is: 109.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.10 : 146.18 = 79.83 : x
  2. Step 2: Convert to fraction form
    106.10/146.18 = 79.83/x
  3. Step 3: Cross multiply
    106.10x = 146.18 × 79.83
  4. Step 4: Simplify right side
    106.10x = 11,669.55
  5. Step 5: Solve for x
    x = 11,669.55/106.10
  6. Step 6: Final answer
    x = 109.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.