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Finding the Fourth Proportional to 75,620.79, 113,422.55 and 20,221.11

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Solution

The fourth proportional to 75,620.79, 113,422.55 and 20,221.11 is: 30,329.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,620.79 : 113,422.55 = 20,221.11 : x
  2. Step 2: Convert to fraction form
    75,620.79/113,422.55 = 20,221.11/x
  3. Step 3: Cross multiply
    75,620.79x = 113,422.55 × 20,221.11
  4. Step 4: Simplify right side
    75,620.79x = 2,293,529,758.92
  5. Step 5: Solve for x
    x = 2,293,529,758.92/75,620.79
  6. Step 6: Final answer
    x = 30,329.35

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1.5x scale

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.