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Finding the Fourth Proportional to 99,571.38, 137,408.43 and 54,859.38

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Solution

The fourth proportional to 99,571.38, 137,408.43 and 54,859.38 is: 75,705.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,571.38 : 137,408.43 = 54,859.38 : x
  2. Step 2: Convert to fraction form
    99,571.38/137,408.43 = 54,859.38/x
  3. Step 3: Cross multiply
    99,571.38x = 137,408.43 × 54,859.38
  4. Step 4: Simplify right side
    99,571.38x = 7,538,141,276.57
  5. Step 5: Solve for x
    x = 7,538,141,276.57/99,571.38
  6. Step 6: Final answer
    x = 75,705.90

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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.