Home / 128,531.41-192,671.27-53,672.96

Finding the Fourth Proportional to 128,531.41, 192,671.27 and 53,672.96

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Solution

The fourth proportional to 128,531.41, 192,671.27 and 53,672.96 is: 80,456.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.41 : 192,671.27 = 53,672.96 : x
  2. Step 2: Convert to fraction form
    128,531.41/192,671.27 = 53,672.96/x
  3. Step 3: Cross multiply
    128,531.41x = 192,671.27 × 53,672.96
  4. Step 4: Simplify right side
    128,531.41x = 10,341,237,367.86
  5. Step 5: Solve for x
    x = 10,341,237,367.86/128,531.41
  6. Step 6: Final answer
    x = 80,456.89

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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.