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Finding the Fourth Proportional to 70,304.28, 105,471.92 and 20,386.46

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Solution

The fourth proportional to 70,304.28, 105,471.92 and 20,386.46 is: 30,584.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,304.28 : 105,471.92 = 20,386.46 : x
  2. Step 2: Convert to fraction form
    70,304.28/105,471.92 = 20,386.46/x
  3. Step 3: Cross multiply
    70,304.28x = 105,471.92 × 20,386.46
  4. Step 4: Simplify right side
    70,304.28x = 2,150,199,289.39
  5. Step 5: Solve for x
    x = 2,150,199,289.39/70,304.28
  6. Step 6: Final answer
    x = 30,584.19

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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.