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Finding the Fourth Proportional to 138,825.96, 191,578.95 and 75,163.56

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Solution

The fourth proportional to 138,825.96, 191,578.95 and 75,163.56 is: 103,725.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,825.96 : 191,578.95 = 75,163.56 : x
  2. Step 2: Convert to fraction form
    138,825.96/191,578.95 = 75,163.56/x
  3. Step 3: Cross multiply
    138,825.96x = 191,578.95 × 75,163.56
  4. Step 4: Simplify right side
    138,825.96x = 14,399,755,903.06
  5. Step 5: Solve for x
    x = 14,399,755,903.06/138,825.96
  6. Step 6: Final answer
    x = 103,725.24

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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.