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Finding the Fourth Proportional to 120,748.66, 166,625.21 and 67,031.06

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Solution

The fourth proportional to 120,748.66, 166,625.21 and 67,031.06 is: 92,498.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,748.66 : 166,625.21 = 67,031.06 : x
  2. Step 2: Convert to fraction form
    120,748.66/166,625.21 = 67,031.06/x
  3. Step 3: Cross multiply
    120,748.66x = 166,625.21 × 67,031.06
  4. Step 4: Simplify right side
    120,748.66x = 11,169,064,449.02
  5. Step 5: Solve for x
    x = 11,169,064,449.02/120,748.66
  6. Step 6: Final answer
    x = 92,498.45

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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.