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Finding the Fourth Proportional to 221,519.88, 332,263.67 and 86,558.58

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Solution

The fourth proportional to 221,519.88, 332,263.67 and 86,558.58 is: 129,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,519.88 : 332,263.67 = 86,558.58 : x
  2. Step 2: Convert to fraction form
    221,519.88/332,263.67 = 86,558.58/x
  3. Step 3: Cross multiply
    221,519.88x = 332,263.67 × 86,558.58
  4. Step 4: Simplify right side
    221,519.88x = 28,760,271,028.00
  5. Step 5: Solve for x
    x = 28,760,271,028.00/221,519.88
  6. Step 6: Final answer
    x = 129,831.56

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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.