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Finding the Fourth Proportional to 321,201.10, 481,801.65 and 99,556.30

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Solution

The fourth proportional to 321,201.10, 481,801.65 and 99,556.30 is: 149,334.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,201.10 : 481,801.65 = 99,556.30 : x
  2. Step 2: Convert to fraction form
    321,201.10/481,801.65 = 99,556.30/x
  3. Step 3: Cross multiply
    321,201.10x = 481,801.65 × 99,556.30
  4. Step 4: Simplify right side
    321,201.10x = 47,966,389,607.90
  5. Step 5: Solve for x
    x = 47,966,389,607.90/321,201.10
  6. Step 6: Final answer
    x = 149,334.45

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1.5x scale

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.