Home / 209,815,865.80-289,540,822.49-115,727,992.11

Finding the Fourth Proportional to 209,815,865.80, 289,540,822.49 and 115,727,992.11

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Solution

The fourth proportional to 209,815,865.80, 289,540,822.49 and 115,727,992.11 is: 159,701,831.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,815,865.80 : 289,540,822.49 = 115,727,992.11 : x
  2. Step 2: Convert to fraction form
    209,815,865.80/289,540,822.49 = 115,727,992.11/x
  3. Step 3: Cross multiply
    209,815,865.80x = 289,540,822.49 × 115,727,992.11
  4. Step 4: Simplify right side
    209,815,865.80x = 33,507,978,019,197,928
  5. Step 5: Solve for x
    x = 33,507,978,019,197,928/209,815,865.80
  6. Step 6: Final answer
    x = 159,701,831.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.