Home / 138,938.52-191,736.18-75,276.72

Finding the Fourth Proportional to 138,938.52, 191,736.18 and 75,276.72

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Solution

The fourth proportional to 138,938.52, 191,736.18 and 75,276.72 is: 103,882.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,938.52 : 191,736.18 = 75,276.72 : x
  2. Step 2: Convert to fraction form
    138,938.52/191,736.18 = 75,276.72/x
  3. Step 3: Cross multiply
    138,938.52x = 191,736.18 × 75,276.72
  4. Step 4: Simplify right side
    138,938.52x = 14,433,270,735.73
  5. Step 5: Solve for x
    x = 14,433,270,735.73/138,938.52
  6. Step 6: Final answer
    x = 103,882.43

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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.