Home / 128,402.58-192,329.55-104,278.16

Finding the Fourth Proportional to 128,402.58, 192,329.55 and 104,278.16

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Solution

The fourth proportional to 128,402.58, 192,329.55 and 104,278.16 is: 156,194.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,402.58 : 192,329.55 = 104,278.16 : x
  2. Step 2: Convert to fraction form
    128,402.58/192,329.55 = 104,278.16/x
  3. Step 3: Cross multiply
    128,402.58x = 192,329.55 × 104,278.16
  4. Step 4: Simplify right side
    128,402.58x = 20,055,770,625.98
  5. Step 5: Solve for x
    x = 20,055,770,625.98/128,402.58
  6. Step 6: Final answer
    x = 156,194.45

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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.