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Finding the Fourth Proportional to 140,137.98, 193,394.49 and 76,479.87

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Solution

The fourth proportional to 140,137.98, 193,394.49 and 76,479.87 is: 105,544.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,137.98 : 193,394.49 = 76,479.87 : x
  2. Step 2: Convert to fraction form
    140,137.98/193,394.49 = 76,479.87/x
  3. Step 3: Cross multiply
    140,137.98x = 193,394.49 × 76,479.87
  4. Step 4: Simplify right side
    140,137.98x = 14,790,785,453.92
  5. Step 5: Solve for x
    x = 14,790,785,453.92/140,137.98
  6. Step 6: Final answer
    x = 105,544.45

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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.