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Finding the Fourth Proportional to 138,588.48, 207,917.28 and 55,480.32

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Solution

The fourth proportional to 138,588.48, 207,917.28 and 55,480.32 is: 83,234.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,588.48 : 207,917.28 = 55,480.32 : x
  2. Step 2: Convert to fraction form
    138,588.48/207,917.28 = 55,480.32/x
  3. Step 3: Cross multiply
    138,588.48x = 207,917.28 × 55,480.32
  4. Step 4: Simplify right side
    138,588.48x = 11,535,317,227.93
  5. Step 5: Solve for x
    x = 11,535,317,227.93/138,588.48
  6. Step 6: Final answer
    x = 83,234.32

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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.