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Finding the Fourth Proportional to 66,429,821.80, 99,644,732.70 and 66,429,821.80

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Solution

The fourth proportional to 66,429,821.80, 99,644,732.70 and 66,429,821.80 is: 99,644,732.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,821.80 : 99,644,732.70 = 66,429,821.80 : x
  2. Step 2: Convert to fraction form
    66,429,821.80/99,644,732.70 = 66,429,821.80/x
  3. Step 3: Cross multiply
    66,429,821.80x = 99,644,732.70 × 66,429,821.80
  4. Step 4: Simplify right side
    66,429,821.80x = 6,619,381,836,569,633
  5. Step 5: Solve for x
    x = 6,619,381,836,569,633/66,429,821.80
  6. Step 6: Final answer
    x = 99,644,732.70

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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.