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Finding the Fourth Proportional to 105,295.81, 157,920.43 and 30,399.67

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Solution

The fourth proportional to 105,295.81, 157,920.43 and 30,399.67 is: 45,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,295.81 : 157,920.43 = 30,399.67 : x
  2. Step 2: Convert to fraction form
    105,295.81/157,920.43 = 30,399.67/x
  3. Step 3: Cross multiply
    105,295.81x = 157,920.43 × 30,399.67
  4. Step 4: Simplify right side
    105,295.81x = 4,800,728,958.26
  5. Step 5: Solve for x
    x = 4,800,728,958.26/105,295.81
  6. Step 6: Final answer
    x = 45,592.78

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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.