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Finding the Fourth Proportional to 171,631.60, 257,370.60 and 66,415.60

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Solution

The fourth proportional to 171,631.60, 257,370.60 and 66,415.60 is: 99,593.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,631.60 : 257,370.60 = 66,415.60 : x
  2. Step 2: Convert to fraction form
    171,631.60/257,370.60 = 66,415.60/x
  3. Step 3: Cross multiply
    171,631.60x = 257,370.60 × 66,415.60
  4. Step 4: Simplify right side
    171,631.60x = 17,093,422,821.36
  5. Step 5: Solve for x
    x = 17,093,422,821.36/171,631.60
  6. Step 6: Final answer
    x = 99,593.68

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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.