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Finding the Fourth Proportional to 100,393.36, 138,519.58 and 60,091.80

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Solution

The fourth proportional to 100,393.36, 138,519.58 and 60,091.80 is: 82,912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,393.36 : 138,519.58 = 60,091.80 : x
  2. Step 2: Convert to fraction form
    100,393.36/138,519.58 = 60,091.80/x
  3. Step 3: Cross multiply
    100,393.36x = 138,519.58 × 60,091.80
  4. Step 4: Simplify right side
    100,393.36x = 8,323,890,897.44
  5. Step 5: Solve for x
    x = 8,323,890,897.44/100,393.36
  6. Step 6: Final answer
    x = 82,912.76

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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.