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Finding the Fourth Proportional to 171,638.80, 257,458.20 and 154,142.80

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Solution

The fourth proportional to 171,638.80, 257,458.20 and 154,142.80 is: 231,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,638.80 : 257,458.20 = 154,142.80 : x
  2. Step 2: Convert to fraction form
    171,638.80/257,458.20 = 154,142.80/x
  3. Step 3: Cross multiply
    171,638.80x = 257,458.20 × 154,142.80
  4. Step 4: Simplify right side
    171,638.80x = 39,685,327,830.96
  5. Step 5: Solve for x
    x = 39,685,327,830.96/171,638.80
  6. Step 6: Final answer
    x = 231,214.20

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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.