Home / 90,828.20-136,472.70-80,690.60

Finding the Fourth Proportional to 90,828.20, 136,472.70 and 80,690.60

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Solution

The fourth proportional to 90,828.20, 136,472.70 and 80,690.60 is: 121,240.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,828.20 : 136,472.70 = 80,690.60 : x
  2. Step 2: Convert to fraction form
    90,828.20/136,472.70 = 80,690.60/x
  3. Step 3: Cross multiply
    90,828.20x = 136,472.70 × 80,690.60
  4. Step 4: Simplify right side
    90,828.20x = 11,012,064,046.62
  5. Step 5: Solve for x
    x = 11,012,064,046.62/90,828.20
  6. Step 6: Final answer
    x = 121,240.58

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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.