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Finding the Fourth Proportional to 156.08, 235.18 and 129.26

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Solution

The fourth proportional to 156.08, 235.18 and 129.26 is: 194.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.08 : 235.18 = 129.26 : x
  2. Step 2: Convert to fraction form
    156.08/235.18 = 129.26/x
  3. Step 3: Cross multiply
    156.08x = 235.18 × 129.26
  4. Step 4: Simplify right side
    156.08x = 30,399.94
  5. Step 5: Solve for x
    x = 30,399.94/156.08
  6. Step 6: Final answer
    x = 194.77

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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.