Home / 209,302,485.20-313,953,727.80-128,680,917.20

Finding the Fourth Proportional to 209,302,485.20, 313,953,727.80 and 128,680,917.20

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Solution

The fourth proportional to 209,302,485.20, 313,953,727.80 and 128,680,917.20 is: 193,021,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,302,485.20 : 313,953,727.80 = 128,680,917.20 : x
  2. Step 2: Convert to fraction form
    209,302,485.20/313,953,727.80 = 128,680,917.20/x
  3. Step 3: Cross multiply
    209,302,485.20x = 313,953,727.80 × 128,680,917.20
  4. Step 4: Simplify right side
    209,302,485.20x = 40,399,853,651,663,144
  5. Step 5: Solve for x
    x = 40,399,853,651,663,144/209,302,485.20
  6. Step 6: Final answer
    x = 193,021,375.80

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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.