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Finding the Fourth Proportional to 114.18, 171.34 and 45.70

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Solution

The fourth proportional to 114.18, 171.34 and 45.70 is: 68.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.18 : 171.34 = 45.70 : x
  2. Step 2: Convert to fraction form
    114.18/171.34 = 45.70/x
  3. Step 3: Cross multiply
    114.18x = 171.34 × 45.70
  4. Step 4: Simplify right side
    114.18x = 7,829.44
  5. Step 5: Solve for x
    x = 7,829.44/114.18
  6. Step 6: Final answer
    x = 68.57

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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.