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Finding the Fourth Proportional to 66,353.40, 99,530.10 and 19,605.60

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Solution

The fourth proportional to 66,353.40, 99,530.10 and 19,605.60 is: 29,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,353.40 : 99,530.10 = 19,605.60 : x
  2. Step 2: Convert to fraction form
    66,353.40/99,530.10 = 19,605.60/x
  3. Step 3: Cross multiply
    66,353.40x = 99,530.10 × 19,605.60
  4. Step 4: Simplify right side
    66,353.40x = 1,951,347,328.56
  5. Step 5: Solve for x
    x = 1,951,347,328.56/66,353.40
  6. Step 6: Final answer
    x = 29,408.40

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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.