Home / 128,203,811.80-192,305,717.70-115,438,730.20

Finding the Fourth Proportional to 128,203,811.80, 192,305,717.70 and 115,438,730.20

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Solution

The fourth proportional to 128,203,811.80, 192,305,717.70 and 115,438,730.20 is: 173,158,095.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,203,811.80 : 192,305,717.70 = 115,438,730.20 : x
  2. Step 2: Convert to fraction form
    128,203,811.80/192,305,717.70 = 115,438,730.20/x
  3. Step 3: Cross multiply
    128,203,811.80x = 192,305,717.70 × 115,438,730.20
  4. Step 4: Simplify right side
    128,203,811.80x = 22,199,527,861,487,664
  5. Step 5: Solve for x
    x = 22,199,527,861,487,664/128,203,811.80
  6. Step 6: Final answer
    x = 173,158,095.30

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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.