Home / 90,853.20-136,279.80-80,830.80

Finding the Fourth Proportional to 90,853.20, 136,279.80 and 80,830.80

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Solution

The fourth proportional to 90,853.20, 136,279.80 and 80,830.80 is: 121,246.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,853.20 : 136,279.80 = 80,830.80 : x
  2. Step 2: Convert to fraction form
    90,853.20/136,279.80 = 80,830.80/x
  3. Step 3: Cross multiply
    90,853.20x = 136,279.80 × 80,830.80
  4. Step 4: Simplify right side
    90,853.20x = 11,015,605,257.84
  5. Step 5: Solve for x
    x = 11,015,605,257.84/90,853.20
  6. Step 6: Final answer
    x = 121,246.20

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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.