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Finding the Fourth Proportional to 70,247.44, 105,387.76 and 20,328.68

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Solution

The fourth proportional to 70,247.44, 105,387.76 and 20,328.68 is: 30,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,247.44 : 105,387.76 = 20,328.68 : x
  2. Step 2: Convert to fraction form
    70,247.44/105,387.76 = 20,328.68/x
  3. Step 3: Cross multiply
    70,247.44x = 105,387.76 × 20,328.68
  4. Step 4: Simplify right side
    70,247.44x = 2,142,394,048.96
  5. Step 5: Solve for x
    x = 2,142,394,048.96/70,247.44
  6. Step 6: Final answer
    x = 30,497.82

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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.