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Finding the Fourth Proportional to 66,656.37, 100,000.35 and 19,910.46

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Solution

The fourth proportional to 66,656.37, 100,000.35 and 19,910.46 is: 29,870.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,656.37 : 100,000.35 = 19,910.46 : x
  2. Step 2: Convert to fraction form
    66,656.37/100,000.35 = 19,910.46/x
  3. Step 3: Cross multiply
    66,656.37x = 100,000.35 × 19,910.46
  4. Step 4: Simplify right side
    66,656.37x = 1,991,052,968.66
  5. Step 5: Solve for x
    x = 1,991,052,968.66/66,656.37
  6. Step 6: Final answer
    x = 29,870.41

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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.