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Finding the Fourth Proportional to 114.47, 171.61 and 53.57

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Solution

The fourth proportional to 114.47, 171.61 and 53.57 is: 80.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.47 : 171.61 = 53.57 : x
  2. Step 2: Convert to fraction form
    114.47/171.61 = 53.57/x
  3. Step 3: Cross multiply
    114.47x = 171.61 × 53.57
  4. Step 4: Simplify right side
    114.47x = 9,193.15
  5. Step 5: Solve for x
    x = 9,193.15/114.47
  6. Step 6: Final answer
    x = 80.31

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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.