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Finding the Fourth Proportional to 120,800.45, 166,788.04 and 75,498.80

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Solution

The fourth proportional to 120,800.45, 166,788.04 and 75,498.80 is: 104,240.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,800.45 : 166,788.04 = 75,498.80 : x
  2. Step 2: Convert to fraction form
    120,800.45/166,788.04 = 75,498.80/x
  3. Step 3: Cross multiply
    120,800.45x = 166,788.04 × 75,498.80
  4. Step 4: Simplify right side
    120,800.45x = 12,592,297,102.58
  5. Step 5: Solve for x
    x = 12,592,297,102.58/120,800.45
  6. Step 6: Final answer
    x = 104,240.48

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1.5x scale

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.