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Finding the Fourth Proportional to 322,172.55, 483,221.79 and 85,533.75

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Solution

The fourth proportional to 322,172.55, 483,221.79 and 85,533.75 is: 128,290.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,172.55 : 483,221.79 = 85,533.75 : x
  2. Step 2: Convert to fraction form
    322,172.55/483,221.79 = 85,533.75/x
  3. Step 3: Cross multiply
    322,172.55x = 483,221.79 × 85,533.75
  4. Step 4: Simplify right side
    322,172.55x = 41,331,771,780.41
  5. Step 5: Solve for x
    x = 41,331,771,780.41/322,172.55
  6. Step 6: Final answer
    x = 128,290.79

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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.