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Finding the Fourth Proportional to 221,772.11, 332,685.83 and 86,818.74

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Solution

The fourth proportional to 221,772.11, 332,685.83 and 86,818.74 is: 130,238.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,772.11 : 332,685.83 = 86,818.74 : x
  2. Step 2: Convert to fraction form
    221,772.11/332,685.83 = 86,818.74/x
  3. Step 3: Cross multiply
    221,772.11x = 332,685.83 × 86,818.74
  4. Step 4: Simplify right side
    221,772.11x = 28,883,364,467.93
  5. Step 5: Solve for x
    x = 28,883,364,467.93/221,772.11
  6. Step 6: Final answer
    x = 130,238.94

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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.