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Finding the Fourth Proportional to 138,275.75, 207,588.68 and 84,836.41

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Solution

The fourth proportional to 138,275.75, 207,588.68 and 84,836.41 is: 127,362.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,275.75 : 207,588.68 = 84,836.41 : x
  2. Step 2: Convert to fraction form
    138,275.75/207,588.68 = 84,836.41/x
  3. Step 3: Cross multiply
    138,275.75x = 207,588.68 × 84,836.41
  4. Step 4: Simplify right side
    138,275.75x = 17,611,078,367.84
  5. Step 5: Solve for x
    x = 17,611,078,367.84/138,275.75
  6. Step 6: Final answer
    x = 127,362.02

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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.