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Finding the Fourth Proportional to 100,397.86, 138,525.79 and 60,096.30

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Solution

The fourth proportional to 100,397.86, 138,525.79 and 60,096.30 is: 82,918.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,397.86 : 138,525.79 = 60,096.30 : x
  2. Step 2: Convert to fraction form
    100,397.86/138,525.79 = 60,096.30/x
  3. Step 3: Cross multiply
    100,397.86x = 138,525.79 × 60,096.30
  4. Step 4: Simplify right side
    100,397.86x = 8,324,887,433.58
  5. Step 5: Solve for x
    x = 8,324,887,433.58/100,397.86
  6. Step 6: Final answer
    x = 82,918.97

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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.