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Finding the Fourth Proportional to 66,399.88, 99,600.12 and 19,653.16

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Solution

The fourth proportional to 66,399.88, 99,600.12 and 19,653.16 is: 29,479.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,399.88 : 99,600.12 = 19,653.16 : x
  2. Step 2: Convert to fraction form
    66,399.88/99,600.12 = 19,653.16/x
  3. Step 3: Cross multiply
    66,399.88x = 99,600.12 × 19,653.16
  4. Step 4: Simplify right side
    66,399.88x = 1,957,457,094.38
  5. Step 5: Solve for x
    x = 1,957,457,094.38/66,399.88
  6. Step 6: Final answer
    x = 29,479.83

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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.