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Finding the Fourth Proportional to 128,344.43, 192,434.64 and 61,651.87

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Solution

The fourth proportional to 128,344.43, 192,434.64 and 61,651.87 is: 92,438.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,344.43 : 192,434.64 = 61,651.87 : x
  2. Step 2: Convert to fraction form
    128,344.43/192,434.64 = 61,651.87/x
  3. Step 3: Cross multiply
    128,344.43x = 192,434.64 × 61,651.87
  4. Step 4: Simplify right side
    128,344.43x = 11,863,954,696.50
  5. Step 5: Solve for x
    x = 11,863,954,696.50/128,344.43
  6. Step 6: Final answer
    x = 92,438.41

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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.