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Finding the Fourth Proportional to 143,609.13, 214,813.67 and 100,911.56

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Solution

The fourth proportional to 143,609.13, 214,813.67 and 100,911.56 is: 150,945.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,609.13 : 214,813.67 = 100,911.56 : x
  2. Step 2: Convert to fraction form
    143,609.13/214,813.67 = 100,911.56/x
  3. Step 3: Cross multiply
    143,609.13x = 214,813.67 × 100,911.56
  4. Step 4: Simplify right side
    143,609.13x = 21,677,180,970.40
  5. Step 5: Solve for x
    x = 21,677,180,970.40/143,609.13
  6. Step 6: Final answer
    x = 150,945.70

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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.