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Finding the Fourth Proportional to 66,411.56, 99,617.16 and 19,668.08

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Solution

The fourth proportional to 66,411.56, 99,617.16 and 19,668.08 is: 29,502.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,411.56 : 99,617.16 = 19,668.08 : x
  2. Step 2: Convert to fraction form
    66,411.56/99,617.16 = 19,668.08/x
  3. Step 3: Cross multiply
    66,411.56x = 99,617.16 × 19,668.08
  4. Step 4: Simplify right side
    66,411.56x = 1,959,278,272.25
  5. Step 5: Solve for x
    x = 1,959,278,272.25/66,411.56
  6. Step 6: Final answer
    x = 29,502.07

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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.