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Finding the Fourth Proportional to 199,798,793.60, 299,698,190.40 and 128,135,177.60

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Solution

The fourth proportional to 199,798,793.60, 299,698,190.40 and 128,135,177.60 is: 192,202,766.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,798,793.60 : 299,698,190.40 = 128,135,177.60 : x
  2. Step 2: Convert to fraction form
    199,798,793.60/299,698,190.40 = 128,135,177.60/x
  3. Step 3: Cross multiply
    199,798,793.60x = 299,698,190.40 × 128,135,177.60
  4. Step 4: Simplify right side
    199,798,793.60x = 38,401,880,853,302,608
  5. Step 5: Solve for x
    x = 38,401,880,853,302,608/199,798,793.60
  6. Step 6: Final answer
    x = 192,202,766.40

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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.