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Finding the Fourth Proportional to 171,320.80, 256,991.28 and 66,140.32

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Solution

The fourth proportional to 171,320.80, 256,991.28 and 66,140.32 is: 99,214.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,320.80 : 256,991.28 = 66,140.32 : x
  2. Step 2: Convert to fraction form
    171,320.80/256,991.28 = 66,140.32/x
  3. Step 3: Cross multiply
    171,320.80x = 256,991.28 × 66,140.32
  4. Step 4: Simplify right side
    171,320.80x = 16,997,485,496.41
  5. Step 5: Solve for x
    x = 16,997,485,496.41/171,320.80
  6. Step 6: Final answer
    x = 99,214.37

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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.