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Finding the Fourth Proportional to 70,362.45, 105,549.17 and 20,443.37

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Solution

The fourth proportional to 70,362.45, 105,549.17 and 20,443.37 is: 30,666.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,362.45 : 105,549.17 = 20,443.37 : x
  2. Step 2: Convert to fraction form
    70,362.45/105,549.17 = 20,443.37/x
  3. Step 3: Cross multiply
    70,362.45x = 105,549.17 × 20,443.37
  4. Step 4: Simplify right side
    70,362.45x = 2,157,780,105.54
  5. Step 5: Solve for x
    x = 2,157,780,105.54/70,362.45
  6. Step 6: Final answer
    x = 30,666.64

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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.