Home / 90,640.94-125,118.19-77,842.74

Finding the Fourth Proportional to 90,640.94, 125,118.19 and 77,842.74

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Solution

The fourth proportional to 90,640.94, 125,118.19 and 77,842.74 is: 107,451.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,640.94 : 125,118.19 = 77,842.74 : x
  2. Step 2: Convert to fraction form
    90,640.94/125,118.19 = 77,842.74/x
  3. Step 3: Cross multiply
    90,640.94x = 125,118.19 × 77,842.74
  4. Step 4: Simplify right side
    90,640.94x = 9,739,542,733.44
  5. Step 5: Solve for x
    x = 9,739,542,733.44/90,640.94
  6. Step 6: Final answer
    x = 107,451.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.