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Finding the Fourth Proportional to 156.92, 236.26 and 139.04

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Solution

The fourth proportional to 156.92, 236.26 and 139.04 is: 209.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.92 : 236.26 = 139.04 : x
  2. Step 2: Convert to fraction form
    156.92/236.26 = 139.04/x
  3. Step 3: Cross multiply
    156.92x = 236.26 × 139.04
  4. Step 4: Simplify right side
    156.92x = 32,849.59
  5. Step 5: Solve for x
    x = 32,849.59/156.92
  6. Step 6: Final answer
    x = 209.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.