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Finding the Fourth Proportional to 139,919.30, 209,817.03 and 40,056.74

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Solution

The fourth proportional to 139,919.30, 209,817.03 and 40,056.74 is: 60,067.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,919.30 : 209,817.03 = 40,056.74 : x
  2. Step 2: Convert to fraction form
    139,919.30/209,817.03 = 40,056.74/x
  3. Step 3: Cross multiply
    139,919.30x = 209,817.03 × 40,056.74
  4. Step 4: Simplify right side
    139,919.30x = 8,404,586,218.28
  5. Step 5: Solve for x
    x = 8,404,586,218.28/139,919.30
  6. Step 6: Final answer
    x = 60,067.38

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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.