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Finding the Fourth Proportional to 171,393.40, 257,090.10 and 115,406.20

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Solution

The fourth proportional to 171,393.40, 257,090.10 and 115,406.20 is: 173,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,393.40 : 257,090.10 = 115,406.20 : x
  2. Step 2: Convert to fraction form
    171,393.40/257,090.10 = 115,406.20/x
  3. Step 3: Cross multiply
    171,393.40x = 257,090.10 × 115,406.20
  4. Step 4: Simplify right side
    171,393.40x = 29,669,791,498.62
  5. Step 5: Solve for x
    x = 29,669,791,498.62/171,393.40
  6. Step 6: Final answer
    x = 173,109.30

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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.