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Finding the Fourth Proportional to 139,992.84, 209,990.09 and 34,811.81

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Solution

The fourth proportional to 139,992.84, 209,990.09 and 34,811.81 is: 52,217.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,992.84 : 209,990.09 = 34,811.81 : x
  2. Step 2: Convert to fraction form
    139,992.84/209,990.09 = 34,811.81/x
  3. Step 3: Cross multiply
    139,992.84x = 209,990.09 × 34,811.81
  4. Step 4: Simplify right side
    139,992.84x = 7,310,134,348.91
  5. Step 5: Solve for x
    x = 7,310,134,348.91/139,992.84
  6. Step 6: Final answer
    x = 52,217.92

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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.