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Finding the Fourth Proportional to 128,474.98, 192,634.44 and 64,358.56

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Solution

The fourth proportional to 128,474.98, 192,634.44 and 64,358.56 is: 96,498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,474.98 : 192,634.44 = 64,358.56 : x
  2. Step 2: Convert to fraction form
    128,474.98/192,634.44 = 64,358.56/x
  3. Step 3: Cross multiply
    128,474.98x = 192,634.44 × 64,358.56
  4. Step 4: Simplify right side
    128,474.98x = 12,397,675,300.17
  5. Step 5: Solve for x
    x = 12,397,675,300.17/128,474.98
  6. Step 6: Final answer
    x = 96,498.75

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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.