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Finding the Fourth Proportional to 138,687.80, 207,910.20 and 94,170.20

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Solution

The fourth proportional to 138,687.80, 207,910.20 and 94,170.20 is: 141,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,687.80 : 207,910.20 = 94,170.20 : x
  2. Step 2: Convert to fraction form
    138,687.80/207,910.20 = 94,170.20/x
  3. Step 3: Cross multiply
    138,687.80x = 207,910.20 × 94,170.20
  4. Step 4: Simplify right side
    138,687.80x = 19,578,945,116.04
  5. Step 5: Solve for x
    x = 19,578,945,116.04/138,687.80
  6. Step 6: Final answer
    x = 141,172.80

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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.