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Finding the Fourth Proportional to 138,226.56, 207,208.48 and 54,040.72

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Solution

The fourth proportional to 138,226.56, 207,208.48 and 54,040.72 is: 81,009.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,226.56 : 207,208.48 = 54,040.72 : x
  2. Step 2: Convert to fraction form
    138,226.56/207,208.48 = 54,040.72/x
  3. Step 3: Cross multiply
    138,226.56x = 207,208.48 × 54,040.72
  4. Step 4: Simplify right side
    138,226.56x = 11,197,695,449.31
  5. Step 5: Solve for x
    x = 11,197,695,449.31/138,226.56
  6. Step 6: Final answer
    x = 81,009.72

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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.