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Finding the Fourth Proportional to 176.21, 242.85 and 159.69

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Solution

The fourth proportional to 176.21, 242.85 and 159.69 is: 220.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.21 : 242.85 = 159.69 : x
  2. Step 2: Convert to fraction form
    176.21/242.85 = 159.69/x
  3. Step 3: Cross multiply
    176.21x = 242.85 × 159.69
  4. Step 4: Simplify right side
    176.21x = 38,780.72
  5. Step 5: Solve for x
    x = 38,780.72/176.21
  6. Step 6: Final answer
    x = 220.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.