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Finding the Fourth Proportional to 100,081.56, 138,109.44 and 59,786.28

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Solution

The fourth proportional to 100,081.56, 138,109.44 and 59,786.28 is: 82,503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,081.56 : 138,109.44 = 59,786.28 : x
  2. Step 2: Convert to fraction form
    100,081.56/138,109.44 = 59,786.28/x
  3. Step 3: Cross multiply
    100,081.56x = 138,109.44 × 59,786.28
  4. Step 4: Simplify right side
    100,081.56x = 8,257,049,650.48
  5. Step 5: Solve for x
    x = 8,257,049,650.48/100,081.56
  6. Step 6: Final answer
    x = 82,503.21

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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.