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Finding the Fourth Proportional to 65,663,906.80, 98,495,860.20 and 20,219,796.40

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Solution

The fourth proportional to 65,663,906.80, 98,495,860.20 and 20,219,796.40 is: 30,329,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,663,906.80 : 98,495,860.20 = 20,219,796.40 : x
  2. Step 2: Convert to fraction form
    65,663,906.80/98,495,860.20 = 20,219,796.40/x
  3. Step 3: Cross multiply
    65,663,906.80x = 98,495,860.20 × 20,219,796.40
  4. Step 4: Simplify right side
    65,663,906.80x = 1,991,566,239,486,863.25
  5. Step 5: Solve for x
    x = 1,991,566,239,486,863.25/65,663,906.80
  6. Step 6: Final answer
    x = 30,329,694.60

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Similar ratio
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1.5x scale

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.