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Finding the Fourth Proportional to 109,674.80, 164,512.20 and 74,245.40

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Solution

The fourth proportional to 109,674.80, 164,512.20 and 74,245.40 is: 111,368.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,674.80 : 164,512.20 = 74,245.40 : x
  2. Step 2: Convert to fraction form
    109,674.80/164,512.20 = 74,245.40/x
  3. Step 3: Cross multiply
    109,674.80x = 164,512.20 × 74,245.40
  4. Step 4: Simplify right side
    109,674.80x = 12,214,274,093.88
  5. Step 5: Solve for x
    x = 12,214,274,093.88/109,674.80
  6. Step 6: Final answer
    x = 111,368.10

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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.