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Finding the Fourth Proportional to 143,366.40, 214,976.70 and 84,220.20

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Solution

The fourth proportional to 143,366.40, 214,976.70 and 84,220.20 is: 126,287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,366.40 : 214,976.70 = 84,220.20 : x
  2. Step 2: Convert to fraction form
    143,366.40/214,976.70 = 84,220.20/x
  3. Step 3: Cross multiply
    143,366.40x = 214,976.70 × 84,220.20
  4. Step 4: Simplify right side
    143,366.40x = 18,105,380,669.34
  5. Step 5: Solve for x
    x = 18,105,380,669.34/143,366.40
  6. Step 6: Final answer
    x = 126,287.48

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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.