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Finding the Fourth Proportional to 221,711.51, 332,600.12 and 81,459.20

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Solution

The fourth proportional to 221,711.51, 332,600.12 and 81,459.20 is: 122,200.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,711.51 : 332,600.12 = 81,459.20 : x
  2. Step 2: Convert to fraction form
    221,711.51/332,600.12 = 81,459.20/x
  3. Step 3: Cross multiply
    221,711.51x = 332,600.12 × 81,459.20
  4. Step 4: Simplify right side
    221,711.51x = 27,093,337,624.81
  5. Step 5: Solve for x
    x = 27,093,337,624.81/221,711.51
  6. Step 6: Final answer
    x = 122,200.86

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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.