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Finding the Fourth Proportional to 161.91, 242.93 and 64.47

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Solution

The fourth proportional to 161.91, 242.93 and 64.47 is: 96.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.91 : 242.93 = 64.47 : x
  2. Step 2: Convert to fraction form
    161.91/242.93 = 64.47/x
  3. Step 3: Cross multiply
    161.91x = 242.93 × 64.47
  4. Step 4: Simplify right side
    161.91x = 15,662.53
  5. Step 5: Solve for x
    x = 15,662.53/161.91
  6. Step 6: Final answer
    x = 96.74

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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.