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Finding the Fourth Proportional to 138,778.80, 208,040.62 and 50,010.60

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Solution

The fourth proportional to 138,778.80, 208,040.62 and 50,010.60 is: 74,969.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,778.80 : 208,040.62 = 50,010.60 : x
  2. Step 2: Convert to fraction form
    138,778.80/208,040.62 = 50,010.60/x
  3. Step 3: Cross multiply
    138,778.80x = 208,040.62 × 50,010.60
  4. Step 4: Simplify right side
    138,778.80x = 10,404,236,230.57
  5. Step 5: Solve for x
    x = 10,404,236,230.57/138,778.80
  6. Step 6: Final answer
    x = 74,969.93

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1.5x scale

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.