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Finding the Fourth Proportional to 321,259.20, 481,889.88 and 81,373.02

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Solution

The fourth proportional to 321,259.20, 481,889.88 and 81,373.02 is: 122,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,259.20 : 481,889.88 = 81,373.02 : x
  2. Step 2: Convert to fraction form
    321,259.20/481,889.88 = 81,373.02/x
  3. Step 3: Cross multiply
    321,259.20x = 481,889.88 × 81,373.02
  4. Step 4: Simplify right side
    321,259.20x = 39,212,834,843.04
  5. Step 5: Solve for x
    x = 39,212,834,843.04/321,259.20
  6. Step 6: Final answer
    x = 122,059.80

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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.