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Finding the Fourth Proportional to 206,982,212.80, 310,473,319.20 and 61,438,237.60

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Solution

The fourth proportional to 206,982,212.80, 310,473,319.20 and 61,438,237.60 is: 92,157,356.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,982,212.80 : 310,473,319.20 = 61,438,237.60 : x
  2. Step 2: Convert to fraction form
    206,982,212.80/310,473,319.20 = 61,438,237.60/x
  3. Step 3: Cross multiply
    206,982,212.80x = 310,473,319.20 × 61,438,237.60
  4. Step 4: Simplify right side
    206,982,212.80x = 19,074,933,553,470,240
  5. Step 5: Solve for x
    x = 19,074,933,553,470,240/206,982,212.80
  6. Step 6: Final answer
    x = 92,157,356.40

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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.