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Finding the Fourth Proportional to 138,449.01, 191,059.73 and 74,786.84

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Solution

The fourth proportional to 138,449.01, 191,059.73 and 74,786.84 is: 103,205.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,449.01 : 191,059.73 = 74,786.84 : x
  2. Step 2: Convert to fraction form
    138,449.01/191,059.73 = 74,786.84/x
  3. Step 3: Cross multiply
    138,449.01x = 191,059.73 × 74,786.84
  4. Step 4: Simplify right side
    138,449.01x = 14,288,752,128.72
  5. Step 5: Solve for x
    x = 14,288,752,128.72/138,449.01
  6. Step 6: Final answer
    x = 103,205.88

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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.