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Finding the Fourth Proportional to 138,468.56, 191,150.40 and 81,099.92

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Solution

The fourth proportional to 138,468.56, 191,150.40 and 81,099.92 is: 111,955.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,468.56 : 191,150.40 = 81,099.92 : x
  2. Step 2: Convert to fraction form
    138,468.56/191,150.40 = 81,099.92/x
  3. Step 3: Cross multiply
    138,468.56x = 191,150.40 × 81,099.92
  4. Step 4: Simplify right side
    138,468.56x = 15,502,282,147.97
  5. Step 5: Solve for x
    x = 15,502,282,147.97/138,468.56
  6. Step 6: Final answer
    x = 111,955.25

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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.