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Finding the Fourth Proportional to 66,549.87, 99,829.59 and 20,953.65

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Solution

The fourth proportional to 66,549.87, 99,829.59 and 20,953.65 is: 31,431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,549.87 : 99,829.59 = 20,953.65 : x
  2. Step 2: Convert to fraction form
    66,549.87/99,829.59 = 20,953.65/x
  3. Step 3: Cross multiply
    66,549.87x = 99,829.59 × 20,953.65
  4. Step 4: Simplify right side
    66,549.87x = 2,091,794,288.50
  5. Step 5: Solve for x
    x = 2,091,794,288.50/66,549.87
  6. Step 6: Final answer
    x = 31,431.98

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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.