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Finding the Fourth Proportional to 66,438,120.30, 99,657,180.45 and 66,438,120.30

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Solution

The fourth proportional to 66,438,120.30, 99,657,180.45 and 66,438,120.30 is: 99,657,180.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438,120.30 : 99,657,180.45 = 66,438,120.30 : x
  2. Step 2: Convert to fraction form
    66,438,120.30/99,657,180.45 = 66,438,120.30/x
  3. Step 3: Cross multiply
    66,438,120.30x = 99,657,180.45 × 66,438,120.30
  4. Step 4: Simplify right side
    66,438,120.30x = 6,621,035,743,495,908
  5. Step 5: Solve for x
    x = 6,621,035,743,495,908/66,438,120.30
  6. Step 6: Final answer
    x = 99,657,180.45

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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.