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Finding the Fourth Proportional to 156.65, 216.17 and 94.49

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Solution

The fourth proportional to 156.65, 216.17 and 94.49 is: 130.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.65 : 216.17 = 94.49 : x
  2. Step 2: Convert to fraction form
    156.65/216.17 = 94.49/x
  3. Step 3: Cross multiply
    156.65x = 216.17 × 94.49
  4. Step 4: Simplify right side
    156.65x = 20,425.90
  5. Step 5: Solve for x
    x = 20,425.90/156.65
  6. Step 6: Final answer
    x = 130.39

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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.