Home / 128,904.20-192,809.55-115,672.85

Finding the Fourth Proportional to 128,904.20, 192,809.55 and 115,672.85

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Solution

The fourth proportional to 128,904.20, 192,809.55 and 115,672.85 is: 173,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,904.20 : 192,809.55 = 115,672.85 : x
  2. Step 2: Convert to fraction form
    128,904.20/192,809.55 = 115,672.85/x
  3. Step 3: Cross multiply
    128,904.20x = 192,809.55 × 115,672.85
  4. Step 4: Simplify right side
    128,904.20x = 22,302,830,155.72
  5. Step 5: Solve for x
    x = 22,302,830,155.72/128,904.20
  6. Step 6: Final answer
    x = 173,018.65

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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.