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Finding the Fourth Proportional to 161.08, 239.90 and 152.80

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Solution

The fourth proportional to 161.08, 239.90 and 152.80 is: 227.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.08 : 239.90 = 152.80 : x
  2. Step 2: Convert to fraction form
    161.08/239.90 = 152.80/x
  3. Step 3: Cross multiply
    161.08x = 239.90 × 152.80
  4. Step 4: Simplify right side
    161.08x = 36,656.72
  5. Step 5: Solve for x
    x = 36,656.72/161.08
  6. Step 6: Final answer
    x = 227.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.