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Finding the Fourth Proportional to 138,035.60, 207,053.40 and 131,474.60

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Solution

The fourth proportional to 138,035.60, 207,053.40 and 131,474.60 is: 197,211.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,035.60 : 207,053.40 = 131,474.60 : x
  2. Step 2: Convert to fraction form
    138,035.60/207,053.40 = 131,474.60/x
  3. Step 3: Cross multiply
    138,035.60x = 207,053.40 × 131,474.60
  4. Step 4: Simplify right side
    138,035.60x = 27,222,262,943.64
  5. Step 5: Solve for x
    x = 27,222,262,943.64/138,035.60
  6. Step 6: Final answer
    x = 197,211.90

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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.