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Finding the Fourth Proportional to 161.98, 242.98 and 70.68

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Solution

The fourth proportional to 161.98, 242.98 and 70.68 is: 106.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.98 : 242.98 = 70.68 : x
  2. Step 2: Convert to fraction form
    161.98/242.98 = 70.68/x
  3. Step 3: Cross multiply
    161.98x = 242.98 × 70.68
  4. Step 4: Simplify right side
    161.98x = 17,173.83
  5. Step 5: Solve for x
    x = 17,173.83/161.98
  6. Step 6: Final answer
    x = 106.02

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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.