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Finding the Fourth Proportional to 143,161.20, 214,914.60 and 142,124.40

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Solution

The fourth proportional to 143,161.20, 214,914.60 and 142,124.40 is: 213,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,161.20 : 214,914.60 = 142,124.40 : x
  2. Step 2: Convert to fraction form
    143,161.20/214,914.60 = 142,124.40/x
  3. Step 3: Cross multiply
    143,161.20x = 214,914.60 × 142,124.40
  4. Step 4: Simplify right side
    143,161.20x = 30,544,608,576.24
  5. Step 5: Solve for x
    x = 30,544,608,576.24/143,161.20
  6. Step 6: Final answer
    x = 213,358.15

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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.