Home / 91,287.08-125,906.76-78,561.44

Finding the Fourth Proportional to 91,287.08, 125,906.76 and 78,561.44

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Solution

The fourth proportional to 91,287.08, 125,906.76 and 78,561.44 is: 108,355.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,287.08 : 125,906.76 = 78,561.44 : x
  2. Step 2: Convert to fraction form
    91,287.08/125,906.76 = 78,561.44/x
  3. Step 3: Cross multiply
    91,287.08x = 125,906.76 × 78,561.44
  4. Step 4: Simplify right side
    91,287.08x = 9,891,416,371.33
  5. Step 5: Solve for x
    x = 9,891,416,371.33/91,287.08
  6. Step 6: Final answer
    x = 108,355.05

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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.