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Finding the Fourth Proportional to 221,911.04, 332,851.20 and 81,643.52

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Solution

The fourth proportional to 221,911.04, 332,851.20 and 81,643.52 is: 122,459.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,911.04 : 332,851.20 = 81,643.52 : x
  2. Step 2: Convert to fraction form
    221,911.04/332,851.20 = 81,643.52/x
  3. Step 3: Cross multiply
    221,911.04x = 332,851.20 × 81,643.52
  4. Step 4: Simplify right side
    221,911.04x = 27,175,143,604.22
  5. Step 5: Solve for x
    x = 27,175,143,604.22/221,911.04
  6. Step 6: Final answer
    x = 122,459.63

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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.