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Finding the Fourth Proportional to 66,128.14, 99,022.65 and 36,513.10

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Solution

The fourth proportional to 66,128.14, 99,022.65 and 36,513.10 is: 54,676.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,128.14 : 99,022.65 = 36,513.10 : x
  2. Step 2: Convert to fraction form
    66,128.14/99,022.65 = 36,513.10/x
  3. Step 3: Cross multiply
    66,128.14x = 99,022.65 × 36,513.10
  4. Step 4: Simplify right side
    66,128.14x = 3,615,623,921.72
  5. Step 5: Solve for x
    x = 3,615,623,921.72/66,128.14
  6. Step 6: Final answer
    x = 54,676.03

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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.