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Finding the Fourth Proportional to 72,561.79, 108,884.22 and 28,182.80

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Solution

The fourth proportional to 72,561.79, 108,884.22 and 28,182.80 is: 42,290.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,561.79 : 108,884.22 = 28,182.80 : x
  2. Step 2: Convert to fraction form
    72,561.79/108,884.22 = 28,182.80/x
  3. Step 3: Cross multiply
    72,561.79x = 108,884.22 × 28,182.80
  4. Step 4: Simplify right side
    72,561.79x = 3,068,662,361.94
  5. Step 5: Solve for x
    x = 3,068,662,361.94/72,561.79
  6. Step 6: Final answer
    x = 42,290.33

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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.