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Finding the Fourth Proportional to 66,223.52, 99,351.84 and 21,852.80

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Solution

The fourth proportional to 66,223.52, 99,351.84 and 21,852.80 is: 32,784.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,223.52 : 99,351.84 = 21,852.80 : x
  2. Step 2: Convert to fraction form
    66,223.52/99,351.84 = 21,852.80/x
  3. Step 3: Cross multiply
    66,223.52x = 99,351.84 × 21,852.80
  4. Step 4: Simplify right side
    66,223.52x = 2,171,115,889.15
  5. Step 5: Solve for x
    x = 2,171,115,889.15/66,223.52
  6. Step 6: Final answer
    x = 32,784.66

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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.