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Finding the Fourth Proportional to 114.45, 171.72 and 104.02

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Solution

The fourth proportional to 114.45, 171.72 and 104.02 is: 156.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.45 : 171.72 = 104.02 : x
  2. Step 2: Convert to fraction form
    114.45/171.72 = 104.02/x
  3. Step 3: Cross multiply
    114.45x = 171.72 × 104.02
  4. Step 4: Simplify right side
    114.45x = 17,861.89
  5. Step 5: Solve for x
    x = 17,861.89/114.45
  6. Step 6: Final answer
    x = 156.07

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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.