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Finding the Fourth Proportional to 161.80, 242.08 and 89.71

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Solution

The fourth proportional to 161.80, 242.08 and 89.71 is: 134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.80 : 242.08 = 89.71 : x
  2. Step 2: Convert to fraction form
    161.80/242.08 = 89.71/x
  3. Step 3: Cross multiply
    161.80x = 242.08 × 89.71
  4. Step 4: Simplify right side
    161.80x = 21,717.00
  5. Step 5: Solve for x
    x = 21,717.00/161.80
  6. Step 6: Final answer
    x = 134.22

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.