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Finding the Fourth Proportional to 161.98, 242.02 and 156.31

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Solution

The fourth proportional to 161.98, 242.02 and 156.31 is: 233.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.98 : 242.02 = 156.31 : x
  2. Step 2: Convert to fraction form
    161.98/242.02 = 156.31/x
  3. Step 3: Cross multiply
    161.98x = 242.02 × 156.31
  4. Step 4: Simplify right side
    161.98x = 37,830.54
  5. Step 5: Solve for x
    x = 37,830.54/161.98
  6. Step 6: Final answer
    x = 233.55

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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.