Home / 206,632,669.77-309,221,020.71-128,946,126.87

Finding the Fourth Proportional to 206,632,669.77, 309,221,020.71 and 128,946,126.87

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Solution

The fourth proportional to 206,632,669.77, 309,221,020.71 and 128,946,126.87 is: 192,964,902.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,632,669.77 : 309,221,020.71 = 128,946,126.87 : x
  2. Step 2: Convert to fraction form
    206,632,669.77/309,221,020.71 = 128,946,126.87/x
  3. Step 3: Cross multiply
    206,632,669.77x = 309,221,020.71 × 128,946,126.87
  4. Step 4: Simplify right side
    206,632,669.77x = 39,872,852,967,342,560
  5. Step 5: Solve for x
    x = 39,872,852,967,342,560/206,632,669.77
  6. Step 6: Final answer
    x = 192,964,902.46

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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.