Home / 81,602.56-121,725.69-80,249.24

Finding the Fourth Proportional to 81,602.56, 121,725.69 and 80,249.24

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Solution

The fourth proportional to 81,602.56, 121,725.69 and 80,249.24 is: 119,706.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,602.56 : 121,725.69 = 80,249.24 : x
  2. Step 2: Convert to fraction form
    81,602.56/121,725.69 = 80,249.24/x
  3. Step 3: Cross multiply
    81,602.56x = 121,725.69 × 80,249.24
  4. Step 4: Simplify right side
    81,602.56x = 9,768,394,110.98
  5. Step 5: Solve for x
    x = 9,768,394,110.98/81,602.56
  6. Step 6: Final answer
    x = 119,706.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.