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Finding the Fourth Proportional to 128,677.52, 192,826.62 and 71,672.94

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Solution

The fourth proportional to 128,677.52, 192,826.62 and 71,672.94 is: 107,403.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,677.52 : 192,826.62 = 71,672.94 : x
  2. Step 2: Convert to fraction form
    128,677.52/192,826.62 = 71,672.94/x
  3. Step 3: Cross multiply
    128,677.52x = 192,826.62 × 71,672.94
  4. Step 4: Simplify right side
    128,677.52x = 13,820,450,765.66
  5. Step 5: Solve for x
    x = 13,820,450,765.66/128,677.52
  6. Step 6: Final answer
    x = 107,403.77

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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.