Home / 285,945.14-428,778.74-86,228.30

Finding the Fourth Proportional to 285,945.14, 428,778.74 and 86,228.30

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Solution

The fourth proportional to 285,945.14, 428,778.74 and 86,228.30 is: 129,300.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,945.14 : 428,778.74 = 86,228.30 : x
  2. Step 2: Convert to fraction form
    285,945.14/428,778.74 = 86,228.30/x
  3. Step 3: Cross multiply
    285,945.14x = 428,778.74 × 86,228.30
  4. Step 4: Simplify right side
    285,945.14x = 36,972,861,826.34
  5. Step 5: Solve for x
    x = 36,972,861,826.34/285,945.14
  6. Step 6: Final answer
    x = 129,300.54

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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.