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Finding the Fourth Proportional to 72,721.98, 100,273.59 and 51,204.85

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Solution

The fourth proportional to 72,721.98, 100,273.59 and 51,204.85 is: 70,604.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,721.98 : 100,273.59 = 51,204.85 : x
  2. Step 2: Convert to fraction form
    72,721.98/100,273.59 = 51,204.85/x
  3. Step 3: Cross multiply
    72,721.98x = 100,273.59 × 51,204.85
  4. Step 4: Simplify right side
    72,721.98x = 5,134,494,134.91
  5. Step 5: Solve for x
    x = 5,134,494,134.91/72,721.98
  6. Step 6: Final answer
    x = 70,604.43

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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.