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Finding the Fourth Proportional to 138,895.68, 191,676.05 and 75,233.48

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Solution

The fourth proportional to 138,895.68, 191,676.05 and 75,233.48 is: 103,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,895.68 : 191,676.05 = 75,233.48 : x
  2. Step 2: Convert to fraction form
    138,895.68/191,676.05 = 75,233.48/x
  3. Step 3: Cross multiply
    138,895.68x = 191,676.05 × 75,233.48
  4. Step 4: Simplify right side
    138,895.68x = 14,420,454,939.61
  5. Step 5: Solve for x
    x = 14,420,454,939.61/138,895.68
  6. Step 6: Final answer
    x = 103,822.20

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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.