Home / 90,821.20-136,215.60-57,481.60

Finding the Fourth Proportional to 90,821.20, 136,215.60 and 57,481.60

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Solution

The fourth proportional to 90,821.20, 136,215.60 and 57,481.60 is: 86,212.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,821.20 : 136,215.60 = 57,481.60 : x
  2. Step 2: Convert to fraction form
    90,821.20/136,215.60 = 57,481.60/x
  3. Step 3: Cross multiply
    90,821.20x = 136,215.60 × 57,481.60
  4. Step 4: Simplify right side
    90,821.20x = 7,829,890,632.96
  5. Step 5: Solve for x
    x = 7,829,890,632.96/90,821.20
  6. Step 6: Final answer
    x = 86,212.15

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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.