Home / 100,636.23-138,879.42-55,318.59

Finding the Fourth Proportional to 100,636.23, 138,879.42 and 55,318.59

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Solution

The fourth proportional to 100,636.23, 138,879.42 and 55,318.59 is: 76,340.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,636.23 : 138,879.42 = 55,318.59 : x
  2. Step 2: Convert to fraction form
    100,636.23/138,879.42 = 55,318.59/x
  3. Step 3: Cross multiply
    100,636.23x = 138,879.42 × 55,318.59
  4. Step 4: Simplify right side
    100,636.23x = 7,682,613,694.42
  5. Step 5: Solve for x
    x = 7,682,613,694.42/100,636.23
  6. Step 6: Final answer
    x = 76,340.44

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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.