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Finding the Fourth Proportional to 206,817.90, 310,226.85 and 135,959.10

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Solution

The fourth proportional to 206,817.90, 310,226.85 and 135,959.10 is: 203,938.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,817.90 : 310,226.85 = 135,959.10 : x
  2. Step 2: Convert to fraction form
    206,817.90/310,226.85 = 135,959.10/x
  3. Step 3: Cross multiply
    206,817.90x = 310,226.85 × 135,959.10
  4. Step 4: Simplify right side
    206,817.90x = 42,178,163,321.84
  5. Step 5: Solve for x
    x = 42,178,163,321.84/206,817.90
  6. Step 6: Final answer
    x = 203,938.65

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1.5x scale

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.