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Finding the Fourth Proportional to 73,197.81, 109,812.15 and 28,220.31

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Solution

The fourth proportional to 73,197.81, 109,812.15 and 28,220.31 is: 42,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,197.81 : 109,812.15 = 28,220.31 : x
  2. Step 2: Convert to fraction form
    73,197.81/109,812.15 = 28,220.31/x
  3. Step 3: Cross multiply
    73,197.81x = 109,812.15 × 28,220.31
  4. Step 4: Simplify right side
    73,197.81x = 3,098,932,914.77
  5. Step 5: Solve for x
    x = 3,098,932,914.77/73,197.81
  6. Step 6: Final answer
    x = 42,336.42

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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.