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Finding the Fourth Proportional to 66,397.92, 99,581.69 and 19,012.11

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Solution

The fourth proportional to 66,397.92, 99,581.69 and 19,012.11 is: 28,513.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,397.92 : 99,581.69 = 19,012.11 : x
  2. Step 2: Convert to fraction form
    66,397.92/99,581.69 = 19,012.11/x
  3. Step 3: Cross multiply
    66,397.92x = 99,581.69 × 19,012.11
  4. Step 4: Simplify right side
    66,397.92x = 1,893,258,044.27
  5. Step 5: Solve for x
    x = 1,893,258,044.27/66,397.92
  6. Step 6: Final answer
    x = 28,513.82

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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.