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Finding the Fourth Proportional to 66,670.20, 100,019.70 and 19,927.80

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Solution

The fourth proportional to 66,670.20, 100,019.70 and 19,927.80 is: 29,896.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,670.20 : 100,019.70 = 19,927.80 : x
  2. Step 2: Convert to fraction form
    66,670.20/100,019.70 = 19,927.80/x
  3. Step 3: Cross multiply
    66,670.20x = 100,019.70 × 19,927.80
  4. Step 4: Simplify right side
    66,670.20x = 1,993,172,577.66
  5. Step 5: Solve for x
    x = 1,993,172,577.66/66,670.20
  6. Step 6: Final answer
    x = 29,896.00

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1.5x scale

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.