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Finding the Fourth Proportional to 321,018.66, 481,530.42 and 84,360.96

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Solution

The fourth proportional to 321,018.66, 481,530.42 and 84,360.96 is: 126,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,018.66 : 481,530.42 = 84,360.96 : x
  2. Step 2: Convert to fraction form
    321,018.66/481,530.42 = 84,360.96/x
  3. Step 3: Cross multiply
    321,018.66x = 481,530.42 × 84,360.96
  4. Step 4: Simplify right side
    321,018.66x = 40,622,368,500.40
  5. Step 5: Solve for x
    x = 40,622,368,500.40/321,018.66
  6. Step 6: Final answer
    x = 126,542.08

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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.