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Finding the Fourth Proportional to 156.71, 216.21 and 94.55

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Solution

The fourth proportional to 156.71, 216.21 and 94.55 is: 130.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.71 : 216.21 = 94.55 : x
  2. Step 2: Convert to fraction form
    156.71/216.21 = 94.55/x
  3. Step 3: Cross multiply
    156.71x = 216.21 × 94.55
  4. Step 4: Simplify right side
    156.71x = 20,442.66
  5. Step 5: Solve for x
    x = 20,442.66/156.71
  6. Step 6: Final answer
    x = 130.45

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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.