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Finding the Fourth Proportional to 91,787.94, 126,344.97 and 80,430.66

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Solution

The fourth proportional to 91,787.94, 126,344.97 and 80,430.66 is: 110,711.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,787.94 : 126,344.97 = 80,430.66 : x
  2. Step 2: Convert to fraction form
    91,787.94/126,344.97 = 80,430.66/x
  3. Step 3: Cross multiply
    91,787.94x = 126,344.97 × 80,430.66
  4. Step 4: Simplify right side
    91,787.94x = 10,162,009,324.78
  5. Step 5: Solve for x
    x = 10,162,009,324.78/91,787.94
  6. Step 6: Final answer
    x = 110,711.81

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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.