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Finding the Fourth Proportional to 125,990.11, 188,919.55 and 47,039.41

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Solution

The fourth proportional to 125,990.11, 188,919.55 and 47,039.41 is: 70,534.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,990.11 : 188,919.55 = 47,039.41 : x
  2. Step 2: Convert to fraction form
    125,990.11/188,919.55 = 47,039.41/x
  3. Step 3: Cross multiply
    125,990.11x = 188,919.55 × 47,039.41
  4. Step 4: Simplify right side
    125,990.11x = 8,886,664,169.47
  5. Step 5: Solve for x
    x = 8,886,664,169.47/125,990.11
  6. Step 6: Final answer
    x = 70,534.62

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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.