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Finding the Fourth Proportional to 206,811.90, 310,217.85 and 135,953.10

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Solution

The fourth proportional to 206,811.90, 310,217.85 and 135,953.10 is: 203,929.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,811.90 : 310,217.85 = 135,953.10 : x
  2. Step 2: Convert to fraction form
    206,811.90/310,217.85 = 135,953.10/x
  3. Step 3: Cross multiply
    206,811.90x = 310,217.85 × 135,953.10
  4. Step 4: Simplify right side
    206,811.90x = 42,175,078,382.84
  5. Step 5: Solve for x
    x = 42,175,078,382.84/206,811.90
  6. Step 6: Final answer
    x = 203,929.65

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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.