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Finding the Fourth Proportional to 66,186, 99,279.72 and 16,938

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Solution

The fourth proportional to 66,186, 99,279.72 and 16,938 is: 25,407.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,186 : 99,279.72 = 16,938 : x
  2. Step 2: Convert to fraction form
    66,186/99,279.72 = 16,938/x
  3. Step 3: Cross multiply
    66,186x = 99,279.72 × 16,938
  4. Step 4: Simplify right side
    66,186x = 1,681,599,897.36
  5. Step 5: Solve for x
    x = 1,681,599,897.36/66,186
  6. Step 6: Final answer
    x = 25,407.18

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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.