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Finding the Fourth Proportional to 66,396.92, 99,580.19 and 19,011.11

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Solution

The fourth proportional to 66,396.92, 99,580.19 and 19,011.11 is: 28,512.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,396.92 : 99,580.19 = 19,011.11 : x
  2. Step 2: Convert to fraction form
    66,396.92/99,580.19 = 19,011.11/x
  3. Step 3: Cross multiply
    66,396.92x = 99,580.19 × 19,011.11
  4. Step 4: Simplify right side
    66,396.92x = 1,893,130,242.39
  5. Step 5: Solve for x
    x = 1,893,130,242.39/66,396.92
  6. Step 6: Final answer
    x = 28,512.32

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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.