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Finding the Fourth Proportional to 220,221.70, 330,381.78 and 70,470.98

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Solution

The fourth proportional to 220,221.70, 330,381.78 and 70,470.98 is: 105,722.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,221.70 : 330,381.78 = 70,470.98 : x
  2. Step 2: Convert to fraction form
    220,221.70/330,381.78 = 70,470.98/x
  3. Step 3: Cross multiply
    220,221.70x = 330,381.78 × 70,470.98
  4. Step 4: Simplify right side
    220,221.70x = 23,282,328,372.43
  5. Step 5: Solve for x
    x = 23,282,328,372.43/220,221.70
  6. Step 6: Final answer
    x = 105,722.23

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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.