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Finding the Fourth Proportional to 138,760.12, 191,489.54 and 75,097.88

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Solution

The fourth proportional to 138,760.12, 191,489.54 and 75,097.88 is: 103,635.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,760.12 : 191,489.54 = 75,097.88 : x
  2. Step 2: Convert to fraction form
    138,760.12/191,489.54 = 75,097.88/x
  3. Step 3: Cross multiply
    138,760.12x = 191,489.54 × 75,097.88
  4. Step 4: Simplify right side
    138,760.12x = 14,380,458,496.18
  5. Step 5: Solve for x
    x = 14,380,458,496.18/138,760.12
  6. Step 6: Final answer
    x = 103,635.39

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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.