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Finding the Fourth Proportional to 161.72, 240.86 and 154.70

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Solution

The fourth proportional to 161.72, 240.86 and 154.70 is: 230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.72 : 240.86 = 154.70 : x
  2. Step 2: Convert to fraction form
    161.72/240.86 = 154.70/x
  3. Step 3: Cross multiply
    161.72x = 240.86 × 154.70
  4. Step 4: Simplify right side
    161.72x = 37,259.06
  5. Step 5: Solve for x
    x = 37,259.06/161.72
  6. Step 6: Final answer
    x = 230.40

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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.