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Finding the Fourth Proportional to 138,848.97, 208,230.30 and 50,090.88

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Solution

The fourth proportional to 138,848.97, 208,230.30 and 50,090.88 is: 75,120.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,848.97 : 208,230.30 = 50,090.88 : x
  2. Step 2: Convert to fraction form
    138,848.97/208,230.30 = 50,090.88/x
  3. Step 3: Cross multiply
    138,848.97x = 208,230.30 × 50,090.88
  4. Step 4: Simplify right side
    138,848.97x = 10,430,438,969.66
  5. Step 5: Solve for x
    x = 10,430,438,969.66/138,848.97
  6. Step 6: Final answer
    x = 75,120.75

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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.