Home / 138,860.82-208,248.08-50,102.78

Finding the Fourth Proportional to 138,860.82, 208,248.08 and 50,102.78

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Solution

The fourth proportional to 138,860.82, 208,248.08 and 50,102.78 is: 75,138.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,860.82 : 208,248.08 = 50,102.78 : x
  2. Step 2: Convert to fraction form
    138,860.82/208,248.08 = 50,102.78/x
  3. Step 3: Cross multiply
    138,860.82x = 208,248.08 × 50,102.78
  4. Step 4: Simplify right side
    138,860.82x = 10,433,806,445.91
  5. Step 5: Solve for x
    x = 10,433,806,445.91/138,860.82
  6. Step 6: Final answer
    x = 75,138.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.