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Finding the Fourth Proportional to 84,745.80, 127,117.79 and 20,704.52

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Solution

The fourth proportional to 84,745.80, 127,117.79 and 20,704.52 is: 31,056.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,745.80 : 127,117.79 = 20,704.52 : x
  2. Step 2: Convert to fraction form
    84,745.80/127,117.79 = 20,704.52/x
  3. Step 3: Cross multiply
    84,745.80x = 127,117.79 × 20,704.52
  4. Step 4: Simplify right side
    84,745.80x = 2,631,912,825.41
  5. Step 5: Solve for x
    x = 2,631,912,825.41/84,745.80
  6. Step 6: Final answer
    x = 31,056.56

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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.