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Finding the Fourth Proportional to 100,394.36, 138,520.96 and 60,092.80

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Solution

The fourth proportional to 100,394.36, 138,520.96 and 60,092.80 is: 82,914.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,394.36 : 138,520.96 = 60,092.80 : x
  2. Step 2: Convert to fraction form
    100,394.36/138,520.96 = 60,092.80/x
  3. Step 3: Cross multiply
    100,394.36x = 138,520.96 × 60,092.80
  4. Step 4: Simplify right side
    100,394.36x = 8,324,112,345.09
  5. Step 5: Solve for x
    x = 8,324,112,345.09/100,394.36
  6. Step 6: Final answer
    x = 82,914.14

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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.