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Finding the Fourth Proportional to 66,057, 99,085.50 and 19,309.88

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Solution

The fourth proportional to 66,057, 99,085.50 and 19,309.88 is: 28,964.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,057 : 99,085.50 = 19,309.88 : x
  2. Step 2: Convert to fraction form
    66,057/99,085.50 = 19,309.88/x
  3. Step 3: Cross multiply
    66,057x = 99,085.50 × 19,309.88
  4. Step 4: Simplify right side
    66,057x = 1,913,328,619.31
  5. Step 5: Solve for x
    x = 1,913,328,619.31/66,057
  6. Step 6: Final answer
    x = 28,964.81

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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.