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Finding the Fourth Proportional to 84,530.97, 126,796.50 and 68,717.16

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Solution

The fourth proportional to 84,530.97, 126,796.50 and 68,717.16 is: 103,075.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,530.97 : 126,796.50 = 68,717.16 : x
  2. Step 2: Convert to fraction form
    84,530.97/126,796.50 = 68,717.16/x
  3. Step 3: Cross multiply
    84,530.97x = 126,796.50 × 68,717.16
  4. Step 4: Simplify right side
    84,530.97x = 8,713,095,377.94
  5. Step 5: Solve for x
    x = 8,713,095,377.94/84,530.97
  6. Step 6: Final answer
    x = 103,075.78

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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.