Home / 285,498.20-428,161.98-85,765.16

Finding the Fourth Proportional to 285,498.20, 428,161.98 and 85,765.16

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Solution

The fourth proportional to 285,498.20, 428,161.98 and 85,765.16 is: 128,622.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,498.20 : 428,161.98 = 85,765.16 : x
  2. Step 2: Convert to fraction form
    285,498.20/428,161.98 = 85,765.16/x
  3. Step 3: Cross multiply
    285,498.20x = 428,161.98 × 85,765.16
  4. Step 4: Simplify right side
    285,498.20x = 36,721,380,720.62
  5. Step 5: Solve for x
    x = 36,721,380,720.62/285,498.20
  6. Step 6: Final answer
    x = 128,622.11

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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.