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Finding the Fourth Proportional to 220,331.10, 330,468.51 and 85,302.80

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Solution

The fourth proportional to 220,331.10, 330,468.51 and 85,302.80 is: 127,943.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,331.10 : 330,468.51 = 85,302.80 : x
  2. Step 2: Convert to fraction form
    220,331.10/330,468.51 = 85,302.80/x
  3. Step 3: Cross multiply
    220,331.10x = 330,468.51 × 85,302.80
  4. Step 4: Simplify right side
    220,331.10x = 28,189,887,644.88
  5. Step 5: Solve for x
    x = 28,189,887,644.88/220,331.10
  6. Step 6: Final answer
    x = 127,943.30

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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.