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Finding the Fourth Proportional to 85,453.58, 128,068.83 and 61,840.64

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Solution

The fourth proportional to 85,453.58, 128,068.83 and 61,840.64 is: 92,680.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,453.58 : 128,068.83 = 61,840.64 : x
  2. Step 2: Convert to fraction form
    85,453.58/128,068.83 = 61,840.64/x
  3. Step 3: Cross multiply
    85,453.58x = 128,068.83 × 61,840.64
  4. Step 4: Simplify right side
    85,453.58x = 7,919,857,770.91
  5. Step 5: Solve for x
    x = 7,919,857,770.91/85,453.58
  6. Step 6: Final answer
    x = 92,680.24

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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.