Home / 213,561.28-320,345.03-55,789.75

Finding the Fourth Proportional to 213,561.28, 320,345.03 and 55,789.75

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Solution

The fourth proportional to 213,561.28, 320,345.03 and 55,789.75 is: 83,685.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,561.28 : 320,345.03 = 55,789.75 : x
  2. Step 2: Convert to fraction form
    213,561.28/320,345.03 = 55,789.75/x
  3. Step 3: Cross multiply
    213,561.28x = 320,345.03 × 55,789.75
  4. Step 4: Simplify right side
    213,561.28x = 17,871,969,137.44
  5. Step 5: Solve for x
    x = 17,871,969,137.44/213,561.28
  6. Step 6: Final answer
    x = 83,685.44

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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.