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Finding the Fourth Proportional to 91,796.49, 126,680.49 and 51,507.90

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Solution

The fourth proportional to 91,796.49, 126,680.49 and 51,507.90 is: 71,081.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,796.49 : 126,680.49 = 51,507.90 : x
  2. Step 2: Convert to fraction form
    91,796.49/126,680.49 = 51,507.90/x
  3. Step 3: Cross multiply
    91,796.49x = 126,680.49 × 51,507.90
  4. Step 4: Simplify right side
    91,796.49x = 6,525,046,010.87
  5. Step 5: Solve for x
    x = 6,525,046,010.87/91,796.49
  6. Step 6: Final answer
    x = 71,081.65

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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.