Home / 218,997.31-328,069.91-143,889.25

Finding the Fourth Proportional to 218,997.31, 328,069.91 and 143,889.25

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Solution

The fourth proportional to 218,997.31, 328,069.91 and 143,889.25 is: 215,553.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,997.31 : 328,069.91 = 143,889.25 : x
  2. Step 2: Convert to fraction form
    218,997.31/328,069.91 = 143,889.25/x
  3. Step 3: Cross multiply
    218,997.31x = 328,069.91 × 143,889.25
  4. Step 4: Simplify right side
    218,997.31x = 47,205,732,988.11
  5. Step 5: Solve for x
    x = 47,205,732,988.11/218,997.31
  6. Step 6: Final answer
    x = 215,553.94

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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.