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Finding the Fourth Proportional to 66,520.96, 99,781.44 and 19,773.76

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Solution

The fourth proportional to 66,520.96, 99,781.44 and 19,773.76 is: 29,660.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,520.96 : 99,781.44 = 19,773.76 : x
  2. Step 2: Convert to fraction form
    66,520.96/99,781.44 = 19,773.76/x
  3. Step 3: Cross multiply
    66,520.96x = 99,781.44 × 19,773.76
  4. Step 4: Simplify right side
    66,520.96x = 1,973,054,247.01
  5. Step 5: Solve for x
    x = 1,973,054,247.01/66,520.96
  6. Step 6: Final answer
    x = 29,660.64

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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.