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Finding the Fourth Proportional to 84,655.82, 126,984.42 and 68,842.46

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Solution

The fourth proportional to 84,655.82, 126,984.42 and 68,842.46 is: 103,264.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,655.82 : 126,984.42 = 68,842.46 : x
  2. Step 2: Convert to fraction form
    84,655.82/126,984.42 = 68,842.46/x
  3. Step 3: Cross multiply
    84,655.82x = 126,984.42 × 68,842.46
  4. Step 4: Simplify right side
    84,655.82x = 8,741,919,219.55
  5. Step 5: Solve for x
    x = 8,741,919,219.55/84,655.82
  6. Step 6: Final answer
    x = 103,264.25

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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.