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Finding the Fourth Proportional to 91,791.84, 126,674.66 and 51,508.50

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Solution

The fourth proportional to 91,791.84, 126,674.66 and 51,508.50 is: 71,082.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,791.84 : 126,674.66 = 51,508.50 : x
  2. Step 2: Convert to fraction form
    91,791.84/126,674.66 = 51,508.50/x
  3. Step 3: Cross multiply
    91,791.84x = 126,674.66 × 51,508.50
  4. Step 4: Simplify right side
    91,791.84x = 6,524,821,724.61
  5. Step 5: Solve for x
    x = 6,524,821,724.61/91,791.84
  6. Step 6: Final answer
    x = 71,082.81

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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.