Home / 128,720.20-192,788.70-76,232.20

Finding the Fourth Proportional to 128,720.20, 192,788.70 and 76,232.20

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Solution

The fourth proportional to 128,720.20, 192,788.70 and 76,232.20 is: 114,175.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,720.20 : 192,788.70 = 76,232.20 : x
  2. Step 2: Convert to fraction form
    128,720.20/192,788.70 = 76,232.20/x
  3. Step 3: Cross multiply
    128,720.20x = 192,788.70 × 76,232.20
  4. Step 4: Simplify right side
    128,720.20x = 14,696,706,736.14
  5. Step 5: Solve for x
    x = 14,696,706,736.14/128,720.20
  6. Step 6: Final answer
    x = 114,175.61

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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.