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Finding the Fourth Proportional to 138,848.78, 208,230.08 and 50,090.71

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Solution

The fourth proportional to 138,848.78, 208,230.08 and 50,090.71 is: 75,120.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,848.78 : 208,230.08 = 50,090.71 : x
  2. Step 2: Convert to fraction form
    138,848.78/208,230.08 = 50,090.71/x
  3. Step 3: Cross multiply
    138,848.78x = 208,230.08 × 50,090.71
  4. Step 4: Simplify right side
    138,848.78x = 10,430,392,550.56
  5. Step 5: Solve for x
    x = 10,430,392,550.56/138,848.78
  6. Step 6: Final answer
    x = 75,120.52

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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.