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Finding the Fourth Proportional to 85,453.08, 128,068.08 and 61,840.14

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Solution

The fourth proportional to 85,453.08, 128,068.08 and 61,840.14 is: 92,679.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,453.08 : 128,068.08 = 61,840.14 : x
  2. Step 2: Convert to fraction form
    85,453.08/128,068.08 = 61,840.14/x
  3. Step 3: Cross multiply
    85,453.08x = 128,068.08 × 61,840.14
  4. Step 4: Simplify right side
    85,453.08x = 7,919,747,996.73
  5. Step 5: Solve for x
    x = 7,919,747,996.73/85,453.08
  6. Step 6: Final answer
    x = 92,679.49

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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.