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Finding the Fourth Proportional to 138,918.00, 191,708.17 and 75,257.17

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Solution

The fourth proportional to 138,918.00, 191,708.17 and 75,257.17 is: 103,855.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,918.00 : 191,708.17 = 75,257.17 : x
  2. Step 2: Convert to fraction form
    138,918.00/191,708.17 = 75,257.17/x
  3. Step 3: Cross multiply
    138,918.00x = 191,708.17 × 75,257.17
  4. Step 4: Simplify right side
    138,918.00x = 14,427,413,672.67
  5. Step 5: Solve for x
    x = 14,427,413,672.67/138,918.00
  6. Step 6: Final answer
    x = 103,855.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.