Home / 81,936.48-123,002.88-55,561.20

Finding the Fourth Proportional to 81,936.48, 123,002.88 and 55,561.20

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Solution

The fourth proportional to 81,936.48, 123,002.88 and 55,561.20 is: 83,408.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,936.48 : 123,002.88 = 55,561.20 : x
  2. Step 2: Convert to fraction form
    81,936.48/123,002.88 = 55,561.20/x
  3. Step 3: Cross multiply
    81,936.48x = 123,002.88 × 55,561.20
  4. Step 4: Simplify right side
    81,936.48x = 6,834,187,616.26
  5. Step 5: Solve for x
    x = 6,834,187,616.26/81,936.48
  6. Step 6: Final answer
    x = 83,408.36

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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.