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Finding the Fourth Proportional to 99,709.14, 137,520.81 and 63,902.49

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Solution

The fourth proportional to 99,709.14, 137,520.81 and 63,902.49 is: 88,135.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,709.14 : 137,520.81 = 63,902.49 : x
  2. Step 2: Convert to fraction form
    99,709.14/137,520.81 = 63,902.49/x
  3. Step 3: Cross multiply
    99,709.14x = 137,520.81 × 63,902.49
  4. Step 4: Simplify right side
    99,709.14x = 8,787,922,185.82
  5. Step 5: Solve for x
    x = 8,787,922,185.82/99,709.14
  6. Step 6: Final answer
    x = 88,135.57

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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.