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Finding the Fourth Proportional to 125,680.87, 188,519.68 and 30,911.86

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Solution

The fourth proportional to 125,680.87, 188,519.68 and 30,911.86 is: 46,367.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,680.87 : 188,519.68 = 30,911.86 : x
  2. Step 2: Convert to fraction form
    125,680.87/188,519.68 = 30,911.86/x
  3. Step 3: Cross multiply
    125,680.87x = 188,519.68 × 30,911.86
  4. Step 4: Simplify right side
    125,680.87x = 5,827,493,955.40
  5. Step 5: Solve for x
    x = 5,827,493,955.40/125,680.87
  6. Step 6: Final answer
    x = 46,367.39

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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.