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Finding the Fourth Proportional to 221,520.88, 332,265.16 and 86,559.58

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Solution

The fourth proportional to 221,520.88, 332,265.16 and 86,559.58 is: 129,833.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,520.88 : 332,265.16 = 86,559.58 : x
  2. Step 2: Convert to fraction form
    221,520.88/332,265.16 = 86,559.58/x
  3. Step 3: Cross multiply
    221,520.88x = 332,265.16 × 86,559.58
  4. Step 4: Simplify right side
    221,520.88x = 28,760,732,698.23
  5. Step 5: Solve for x
    x = 28,760,732,698.23/221,520.88
  6. Step 6: Final answer
    x = 129,833.06

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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.