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Finding the Fourth Proportional to 100,561.56, 138,822.12 and 58,111.80

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Solution

The fourth proportional to 100,561.56, 138,822.12 and 58,111.80 is: 80,221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,561.56 : 138,822.12 = 58,111.80 : x
  2. Step 2: Convert to fraction form
    100,561.56/138,822.12 = 58,111.80/x
  3. Step 3: Cross multiply
    100,561.56x = 138,822.12 × 58,111.80
  4. Step 4: Simplify right side
    100,561.56x = 8,067,203,273.02
  5. Step 5: Solve for x
    x = 8,067,203,273.02/100,561.56
  6. Step 6: Final answer
    x = 80,221.54

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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.