Home / 90,840.20-136,260.30-80,817.80

Finding the Fourth Proportional to 90,840.20, 136,260.30 and 80,817.80

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Solution

The fourth proportional to 90,840.20, 136,260.30 and 80,817.80 is: 121,226.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,840.20 : 136,260.30 = 80,817.80 : x
  2. Step 2: Convert to fraction form
    90,840.20/136,260.30 = 80,817.80/x
  3. Step 3: Cross multiply
    90,840.20x = 136,260.30 × 80,817.80
  4. Step 4: Simplify right side
    90,840.20x = 11,012,257,673.34
  5. Step 5: Solve for x
    x = 11,012,257,673.34/90,840.20
  6. Step 6: Final answer
    x = 121,226.70

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1.5x scale

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.