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Finding the Fourth Proportional to 137,903.40, 206,855.10 and 67,919.40

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Solution

The fourth proportional to 137,903.40, 206,855.10 and 67,919.40 is: 101,879.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,903.40 : 206,855.10 = 67,919.40 : x
  2. Step 2: Convert to fraction form
    137,903.40/206,855.10 = 67,919.40/x
  3. Step 3: Cross multiply
    137,903.40x = 206,855.10 × 67,919.40
  4. Step 4: Simplify right side
    137,903.40x = 14,049,474,278.94
  5. Step 5: Solve for x
    x = 14,049,474,278.94/137,903.40
  6. Step 6: Final answer
    x = 101,879.10

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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.