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Finding the Fourth Proportional to 171,362.68, 236,805.81 and 128,847.40

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Solution

The fourth proportional to 171,362.68, 236,805.81 and 128,847.40 is: 178,054.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,362.68 : 236,805.81 = 128,847.40 : x
  2. Step 2: Convert to fraction form
    171,362.68/236,805.81 = 128,847.40/x
  3. Step 3: Cross multiply
    171,362.68x = 236,805.81 × 128,847.40
  4. Step 4: Simplify right side
    171,362.68x = 30,511,812,923.39
  5. Step 5: Solve for x
    x = 30,511,812,923.39/171,362.68
  6. Step 6: Final answer
    x = 178,054.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.