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Finding the Fourth Proportional to 156.96, 236.36 and 136.91

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Solution

The fourth proportional to 156.96, 236.36 and 136.91 is: 206.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.96 : 236.36 = 136.91 : x
  2. Step 2: Convert to fraction form
    156.96/236.36 = 136.91/x
  3. Step 3: Cross multiply
    156.96x = 236.36 × 136.91
  4. Step 4: Simplify right side
    156.96x = 32,360.98
  5. Step 5: Solve for x
    x = 32,360.98/156.96
  6. Step 6: Final answer
    x = 206.17

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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.