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Finding the Fourth Proportional to 138,176.56, 207,112.65 and 53,921.17

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Solution

The fourth proportional to 138,176.56, 207,112.65 and 53,921.17 is: 80,822.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,176.56 : 207,112.65 = 53,921.17 : x
  2. Step 2: Convert to fraction form
    138,176.56/207,112.65 = 53,921.17/x
  3. Step 3: Cross multiply
    138,176.56x = 207,112.65 × 53,921.17
  4. Step 4: Simplify right side
    138,176.56x = 11,167,756,409.80
  5. Step 5: Solve for x
    x = 11,167,756,409.80/138,176.56
  6. Step 6: Final answer
    x = 80,822.37

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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.