Home / 128,664,289.80-192,996,434.70-115,059,400.20

Finding the Fourth Proportional to 128,664,289.80, 192,996,434.70 and 115,059,400.20

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Solution

The fourth proportional to 128,664,289.80, 192,996,434.70 and 115,059,400.20 is: 172,589,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,664,289.80 : 192,996,434.70 = 115,059,400.20 : x
  2. Step 2: Convert to fraction form
    128,664,289.80/192,996,434.70 = 115,059,400.20/x
  3. Step 3: Cross multiply
    128,664,289.80x = 192,996,434.70 × 115,059,400.20
  4. Step 4: Simplify right side
    128,664,289.80x = 22,206,054,017,320,468
  5. Step 5: Solve for x
    x = 22,206,054,017,320,468/128,664,289.80
  6. Step 6: Final answer
    x = 172,589,100.30

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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.