Home / 91,191.20-125,857.07-65,781.77

Finding the Fourth Proportional to 91,191.20, 125,857.07 and 65,781.77

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Solution

The fourth proportional to 91,191.20, 125,857.07 and 65,781.77 is: 90,788.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,191.20 : 125,857.07 = 65,781.77 : x
  2. Step 2: Convert to fraction form
    91,191.20/125,857.07 = 65,781.77/x
  3. Step 3: Cross multiply
    91,191.20x = 125,857.07 × 65,781.77
  4. Step 4: Simplify right side
    91,191.20x = 8,279,099,873.42
  5. Step 5: Solve for x
    x = 8,279,099,873.42/91,191.20
  6. Step 6: Final answer
    x = 90,788.37

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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.