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Finding the Fourth Proportional to 161.19, 240.71 and 156.87

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Solution

The fourth proportional to 161.19, 240.71 and 156.87 is: 234.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.19 : 240.71 = 156.87 : x
  2. Step 2: Convert to fraction form
    161.19/240.71 = 156.87/x
  3. Step 3: Cross multiply
    161.19x = 240.71 × 156.87
  4. Step 4: Simplify right side
    161.19x = 37,759.39
  5. Step 5: Solve for x
    x = 37,759.39/161.19
  6. Step 6: Final answer
    x = 234.25

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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.