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Finding the Fourth Proportional to 106.98, 160.50 and 79.74

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Solution

The fourth proportional to 106.98, 160.50 and 79.74 is: 119.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.98 : 160.50 = 79.74 : x
  2. Step 2: Convert to fraction form
    106.98/160.50 = 79.74/x
  3. Step 3: Cross multiply
    106.98x = 160.50 × 79.74
  4. Step 4: Simplify right side
    106.98x = 12,798.27
  5. Step 5: Solve for x
    x = 12,798.27/106.98
  6. Step 6: Final answer
    x = 119.63

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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.