Home / 206,632,670.77-309,221,022.21-128,946,127.87

Finding the Fourth Proportional to 206,632,670.77, 309,221,022.21 and 128,946,127.87

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Solution

The fourth proportional to 206,632,670.77, 309,221,022.21 and 128,946,127.87 is: 192,964,903.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,632,670.77 : 309,221,022.21 = 128,946,127.87 : x
  2. Step 2: Convert to fraction form
    206,632,670.77/309,221,022.21 = 128,946,127.87/x
  3. Step 3: Cross multiply
    206,632,670.77x = 309,221,022.21 × 128,946,127.87
  4. Step 4: Simplify right side
    206,632,670.77x = 39,872,853,469,982,768
  5. Step 5: Solve for x
    x = 39,872,853,469,982,768/206,632,670.77
  6. Step 6: Final answer
    x = 192,964,903.96

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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.