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Finding the Fourth Proportional to 66,111.55, 99,179.90 and 21,751.09

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Solution

The fourth proportional to 66,111.55, 99,179.90 and 21,751.09 is: 32,630.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,111.55 : 99,179.90 = 21,751.09 : x
  2. Step 2: Convert to fraction form
    66,111.55/99,179.90 = 21,751.09/x
  3. Step 3: Cross multiply
    66,111.55x = 99,179.90 × 21,751.09
  4. Step 4: Simplify right side
    66,111.55x = 2,157,270,822.34
  5. Step 5: Solve for x
    x = 2,157,270,822.34/66,111.55
  6. Step 6: Final answer
    x = 32,630.77

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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.