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Finding the Fourth Proportional to 220,463.11, 330,768.47 and 87,381.43

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Solution

The fourth proportional to 220,463.11, 330,768.47 and 87,381.43 is: 131,101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,463.11 : 330,768.47 = 87,381.43 : x
  2. Step 2: Convert to fraction form
    220,463.11/330,768.47 = 87,381.43/x
  3. Step 3: Cross multiply
    220,463.11x = 330,768.47 × 87,381.43
  4. Step 4: Simplify right side
    220,463.11x = 28,903,021,299.04
  5. Step 5: Solve for x
    x = 28,903,021,299.04/220,463.11
  6. Step 6: Final answer
    x = 131,101.40

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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.