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Finding the Fourth Proportional to 173,729.40, 260,739.90 and 85,058.70

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Solution

The fourth proportional to 173,729.40, 260,739.90 and 85,058.70 is: 127,659.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,729.40 : 260,739.90 = 85,058.70 : x
  2. Step 2: Convert to fraction form
    173,729.40/260,739.90 = 85,058.70/x
  3. Step 3: Cross multiply
    173,729.40x = 260,739.90 × 85,058.70
  4. Step 4: Simplify right side
    173,729.40x = 22,178,196,932.13
  5. Step 5: Solve for x
    x = 22,178,196,932.13/173,729.40
  6. Step 6: Final answer
    x = 127,659.43

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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.