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Finding the Fourth Proportional to 243,311.85, 335,768.90 and 135,882.09

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Solution

The fourth proportional to 243,311.85, 335,768.90 and 135,882.09 is: 187,516.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,311.85 : 335,768.90 = 135,882.09 : x
  2. Step 2: Convert to fraction form
    243,311.85/335,768.90 = 135,882.09/x
  3. Step 3: Cross multiply
    243,311.85x = 335,768.90 × 135,882.09
  4. Step 4: Simplify right side
    243,311.85x = 45,624,979,209.59
  5. Step 5: Solve for x
    x = 45,624,979,209.59/243,311.85
  6. Step 6: Final answer
    x = 187,516.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.