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Finding the Fourth Proportional to 138,797.95, 191,863.97 and 123,838.87

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Solution

The fourth proportional to 138,797.95, 191,863.97 and 123,838.87 is: 171,185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,797.95 : 191,863.97 = 123,838.87 : x
  2. Step 2: Convert to fraction form
    138,797.95/191,863.97 = 123,838.87/x
  3. Step 3: Cross multiply
    138,797.95x = 191,863.97 × 123,838.87
  4. Step 4: Simplify right side
    138,797.95x = 23,760,216,588.79
  5. Step 5: Solve for x
    x = 23,760,216,588.79/138,797.95
  6. Step 6: Final answer
    x = 171,185.65

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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.