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Finding the Fourth Proportional to 80,915.94, 111,661.70 and 45,105.21

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Solution

The fourth proportional to 80,915.94, 111,661.70 and 45,105.21 is: 62,243.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,915.94 : 111,661.70 = 45,105.21 : x
  2. Step 2: Convert to fraction form
    80,915.94/111,661.70 = 45,105.21/x
  3. Step 3: Cross multiply
    80,915.94x = 111,661.70 × 45,105.21
  4. Step 4: Simplify right side
    80,915.94x = 5,036,524,201.93
  5. Step 5: Solve for x
    x = 5,036,524,201.93/80,915.94
  6. Step 6: Final answer
    x = 62,243.91

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1.5x scale

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.