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Finding the Fourth Proportional to 66,442,591.20, 99,663,886.80 and 66,442,591.20

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Solution

The fourth proportional to 66,442,591.20, 99,663,886.80 and 66,442,591.20 is: 99,663,886.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,442,591.20 : 99,663,886.80 = 66,442,591.20 : x
  2. Step 2: Convert to fraction form
    66,442,591.20/99,663,886.80 = 66,442,591.20/x
  3. Step 3: Cross multiply
    66,442,591.20x = 99,663,886.80 × 66,442,591.20
  4. Step 4: Simplify right side
    66,442,591.20x = 6,621,926,888,055,476
  5. Step 5: Solve for x
    x = 6,621,926,888,055,476/66,442,591.20
  6. Step 6: Final answer
    x = 99,663,886.80

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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.