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Finding the Fourth Proportional to 188,691.88, 260,286.66 and 117,913

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Solution

The fourth proportional to 188,691.88, 260,286.66 and 117,913 is: 162,652.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,691.88 : 260,286.66 = 117,913 : x
  2. Step 2: Convert to fraction form
    188,691.88/260,286.66 = 117,913/x
  3. Step 3: Cross multiply
    188,691.88x = 260,286.66 × 117,913
  4. Step 4: Simplify right side
    188,691.88x = 30,691,180,940.58
  5. Step 5: Solve for x
    x = 30,691,180,940.58/188,691.88
  6. Step 6: Final answer
    x = 162,652.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.