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Finding the Fourth Proportional to 156.55, 234.42 and 84.06

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Solution

The fourth proportional to 156.55, 234.42 and 84.06 is: 125.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.55 : 234.42 = 84.06 : x
  2. Step 2: Convert to fraction form
    156.55/234.42 = 84.06/x
  3. Step 3: Cross multiply
    156.55x = 234.42 × 84.06
  4. Step 4: Simplify right side
    156.55x = 19,705.35
  5. Step 5: Solve for x
    x = 19,705.35/156.55
  6. Step 6: Final answer
    x = 125.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.