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Finding the Fourth Proportional to 128,694.41, 193,065.90 and 48,756.29

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Solution

The fourth proportional to 128,694.41, 193,065.90 and 48,756.29 is: 73,143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,694.41 : 193,065.90 = 48,756.29 : x
  2. Step 2: Convert to fraction form
    128,694.41/193,065.90 = 48,756.29/x
  3. Step 3: Cross multiply
    128,694.41x = 193,065.90 × 48,756.29
  4. Step 4: Simplify right side
    128,694.41x = 9,413,176,765.73
  5. Step 5: Solve for x
    x = 9,413,176,765.73/128,694.41
  6. Step 6: Final answer
    x = 73,143.63

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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.