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Finding the Fourth Proportional to 72,614.36, 108,928.26 and 28,244.48

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Solution

The fourth proportional to 72,614.36, 108,928.26 and 28,244.48 is: 42,369.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,614.36 : 108,928.26 = 28,244.48 : x
  2. Step 2: Convert to fraction form
    72,614.36/108,928.26 = 28,244.48/x
  3. Step 3: Cross multiply
    72,614.36x = 108,928.26 × 28,244.48
  4. Step 4: Simplify right side
    72,614.36x = 3,076,622,061.00
  5. Step 5: Solve for x
    x = 3,076,622,061.00/72,614.36
  6. Step 6: Final answer
    x = 42,369.33

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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.