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Finding the Fourth Proportional to 66,163.64, 99,230.50 and 19,420.16

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Solution

The fourth proportional to 66,163.64, 99,230.50 and 19,420.16 is: 29,125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,163.64 : 99,230.50 = 19,420.16 : x
  2. Step 2: Convert to fraction form
    66,163.64/99,230.50 = 19,420.16/x
  3. Step 3: Cross multiply
    66,163.64x = 99,230.50 × 19,420.16
  4. Step 4: Simplify right side
    66,163.64x = 1,927,072,186.88
  5. Step 5: Solve for x
    x = 1,927,072,186.88/66,163.64
  6. Step 6: Final answer
    x = 29,125.85

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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.