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Finding the Fourth Proportional to 170,905.40, 256,358.10 and 161,063.90

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Solution

The fourth proportional to 170,905.40, 256,358.10 and 161,063.90 is: 241,595.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,905.40 : 256,358.10 = 161,063.90 : x
  2. Step 2: Convert to fraction form
    170,905.40/256,358.10 = 161,063.90/x
  3. Step 3: Cross multiply
    170,905.40x = 256,358.10 × 161,063.90
  4. Step 4: Simplify right side
    170,905.40x = 41,290,035,382.59
  5. Step 5: Solve for x
    x = 41,290,035,382.59/170,905.40
  6. Step 6: Final answer
    x = 241,595.85

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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.