Home / 128,110.79-192,073.84-78,179.15

Finding the Fourth Proportional to 128,110.79, 192,073.84 and 78,179.15

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Solution

The fourth proportional to 128,110.79, 192,073.84 and 78,179.15 is: 117,212.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,110.79 : 192,073.84 = 78,179.15 : x
  2. Step 2: Convert to fraction form
    128,110.79/192,073.84 = 78,179.15/x
  3. Step 3: Cross multiply
    128,110.79x = 192,073.84 × 78,179.15
  4. Step 4: Simplify right side
    128,110.79x = 15,016,168,392.62
  5. Step 5: Solve for x
    x = 15,016,168,392.62/128,110.79
  6. Step 6: Final answer
    x = 117,212.37

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1.5x scale

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.