Home / 143,400.22-215,129.06-80,310.08

Finding the Fourth Proportional to 143,400.22, 215,129.06 and 80,310.08

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Solution

The fourth proportional to 143,400.22, 215,129.06 and 80,310.08 is: 120,481.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,400.22 : 215,129.06 = 80,310.08 : x
  2. Step 2: Convert to fraction form
    143,400.22/215,129.06 = 80,310.08/x
  3. Step 3: Cross multiply
    143,400.22x = 215,129.06 × 80,310.08
  4. Step 4: Simplify right side
    143,400.22x = 17,277,032,018.92
  5. Step 5: Solve for x
    x = 17,277,032,018.92/143,400.22
  6. Step 6: Final answer
    x = 120,481.21

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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.