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Finding the Fourth Proportional to 143,357.09, 214,893.59 and 67,319.51

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Solution

The fourth proportional to 143,357.09, 214,893.59 and 67,319.51 is: 100,912.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,357.09 : 214,893.59 = 67,319.51 : x
  2. Step 2: Convert to fraction form
    143,357.09/214,893.59 = 67,319.51/x
  3. Step 3: Cross multiply
    143,357.09x = 214,893.59 × 67,319.51
  4. Step 4: Simplify right side
    143,357.09x = 14,466,529,769.88
  5. Step 5: Solve for x
    x = 14,466,529,769.88/143,357.09
  6. Step 6: Final answer
    x = 100,912.56

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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.