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Finding the Fourth Proportional to 66,428.60, 99,644.74 and 16,506.68

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Solution

The fourth proportional to 66,428.60, 99,644.74 and 16,506.68 is: 24,760.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.60 : 99,644.74 = 16,506.68 : x
  2. Step 2: Convert to fraction form
    66,428.60/99,644.74 = 16,506.68/x
  3. Step 3: Cross multiply
    66,428.60x = 99,644.74 × 16,506.68
  4. Step 4: Simplify right side
    66,428.60x = 1,644,803,836.86
  5. Step 5: Solve for x
    x = 1,644,803,836.86/66,428.60
  6. Step 6: Final answer
    x = 24,760.48

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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.