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Finding the Fourth Proportional to 192,685.20, 289,027.80 and 74,360.40

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Solution

The fourth proportional to 192,685.20, 289,027.80 and 74,360.40 is: 111,540.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,685.20 : 289,027.80 = 74,360.40 : x
  2. Step 2: Convert to fraction form
    192,685.20/289,027.80 = 74,360.40/x
  3. Step 3: Cross multiply
    192,685.20x = 289,027.80 × 74,360.40
  4. Step 4: Simplify right side
    192,685.20x = 21,492,222,819.12
  5. Step 5: Solve for x
    x = 21,492,222,819.12/192,685.20
  6. Step 6: Final answer
    x = 111,540.60

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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.