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Finding the Fourth Proportional to 221,911.88, 332,917.06 and 64,128.38

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Solution

The fourth proportional to 221,911.88, 332,917.06 and 64,128.38 is: 96,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,911.88 : 332,917.06 = 64,128.38 : x
  2. Step 2: Convert to fraction form
    221,911.88/332,917.06 = 64,128.38/x
  3. Step 3: Cross multiply
    221,911.88x = 332,917.06 × 64,128.38
  4. Step 4: Simplify right side
    221,911.88x = 21,349,431,732.16
  5. Step 5: Solve for x
    x = 21,349,431,732.16/221,911.88
  6. Step 6: Final answer
    x = 96,206.80

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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.