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Finding the Fourth Proportional to 72,226.88, 99,671.24 and 39,960.68

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Solution

The fourth proportional to 72,226.88, 99,671.24 and 39,960.68 is: 55,144.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,226.88 : 99,671.24 = 39,960.68 : x
  2. Step 2: Convert to fraction form
    72,226.88/99,671.24 = 39,960.68/x
  3. Step 3: Cross multiply
    72,226.88x = 99,671.24 × 39,960.68
  4. Step 4: Simplify right side
    72,226.88x = 3,982,930,526.84
  5. Step 5: Solve for x
    x = 3,982,930,526.84/72,226.88
  6. Step 6: Final answer
    x = 55,144.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.