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Finding the Fourth Proportional to 161.19, 241.72 and 51.47

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Solution

The fourth proportional to 161.19, 241.72 and 51.47 is: 77.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.19 : 241.72 = 51.47 : x
  2. Step 2: Convert to fraction form
    161.19/241.72 = 51.47/x
  3. Step 3: Cross multiply
    161.19x = 241.72 × 51.47
  4. Step 4: Simplify right side
    161.19x = 12,440.12
  5. Step 5: Solve for x
    x = 12,440.12/161.19
  6. Step 6: Final answer
    x = 77.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.