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Finding the Fourth Proportional to 72,661.15, 108,947.13 and 28,236.03

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Solution

The fourth proportional to 72,661.15, 108,947.13 and 28,236.03 is: 42,336.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,661.15 : 108,947.13 = 28,236.03 : x
  2. Step 2: Convert to fraction form
    72,661.15/108,947.13 = 28,236.03/x
  3. Step 3: Cross multiply
    72,661.15x = 108,947.13 × 28,236.03
  4. Step 4: Simplify right side
    72,661.15x = 3,076,233,916.66
  5. Step 5: Solve for x
    x = 3,076,233,916.66/72,661.15
  6. Step 6: Final answer
    x = 42,336.71

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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.