Home / 80,917.56-111,714.07-71,940.21

Finding the Fourth Proportional to 80,917.56, 111,714.07 and 71,940.21

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Solution

The fourth proportional to 80,917.56, 111,714.07 and 71,940.21 is: 99,320.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,917.56 : 111,714.07 = 71,940.21 : x
  2. Step 2: Convert to fraction form
    80,917.56/111,714.07 = 71,940.21/x
  3. Step 3: Cross multiply
    80,917.56x = 111,714.07 × 71,940.21
  4. Step 4: Simplify right side
    80,917.56x = 8,036,733,655.75
  5. Step 5: Solve for x
    x = 8,036,733,655.75/80,917.56
  6. Step 6: Final answer
    x = 99,320.02

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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.