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Finding the Fourth Proportional to 213,803.79, 320,610.91 and 113,945.37

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Solution

The fourth proportional to 213,803.79, 320,610.91 and 113,945.37 is: 170,867.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,803.79 : 320,610.91 = 113,945.37 : x
  2. Step 2: Convert to fraction form
    213,803.79/320,610.91 = 113,945.37/x
  3. Step 3: Cross multiply
    213,803.79x = 320,610.91 × 113,945.37
  4. Step 4: Simplify right side
    213,803.79x = 36,532,128,765.99
  5. Step 5: Solve for x
    x = 36,532,128,765.99/213,803.79
  6. Step 6: Final answer
    x = 170,867.55

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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.