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Finding the Fourth Proportional to 114.43, 171.46 and 87.30

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Solution

The fourth proportional to 114.43, 171.46 and 87.30 is: 130.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.43 : 171.46 = 87.30 : x
  2. Step 2: Convert to fraction form
    114.43/171.46 = 87.30/x
  3. Step 3: Cross multiply
    114.43x = 171.46 × 87.30
  4. Step 4: Simplify right side
    114.43x = 14,968.46
  5. Step 5: Solve for x
    x = 14,968.46/114.43
  6. Step 6: Final answer
    x = 130.81

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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.