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Finding the Fourth Proportional to 143,725.63, 215,509.09 and 66,704.65

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Solution

The fourth proportional to 143,725.63, 215,509.09 and 66,704.65 is: 100,020.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,725.63 : 215,509.09 = 66,704.65 : x
  2. Step 2: Convert to fraction form
    143,725.63/215,509.09 = 66,704.65/x
  3. Step 3: Cross multiply
    143,725.63x = 215,509.09 × 66,704.65
  4. Step 4: Simplify right side
    143,725.63x = 14,375,458,420.27
  5. Step 5: Solve for x
    x = 14,375,458,420.27/143,725.63
  6. Step 6: Final answer
    x = 100,020.15

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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.