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Finding the Fourth Proportional to 70,308.64, 105,441.23 and 20,392.41

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Solution

The fourth proportional to 70,308.64, 105,441.23 and 20,392.41 is: 30,582.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,308.64 : 105,441.23 = 20,392.41 : x
  2. Step 2: Convert to fraction form
    70,308.64/105,441.23 = 20,392.41/x
  3. Step 3: Cross multiply
    70,308.64x = 105,441.23 × 20,392.41
  4. Step 4: Simplify right side
    70,308.64x = 2,150,200,793.06
  5. Step 5: Solve for x
    x = 2,150,200,793.06/70,308.64
  6. Step 6: Final answer
    x = 30,582.31

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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.