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Finding the Fourth Proportional to 72,578.36, 108,839.54 and 28,199.27

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Solution

The fourth proportional to 72,578.36, 108,839.54 and 28,199.27 is: 42,288.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578.36 : 108,839.54 = 28,199.27 : x
  2. Step 2: Convert to fraction form
    72,578.36/108,839.54 = 28,199.27/x
  3. Step 3: Cross multiply
    72,578.36x = 108,839.54 × 28,199.27
  4. Step 4: Simplify right side
    72,578.36x = 3,069,195,101.44
  5. Step 5: Solve for x
    x = 3,069,195,101.44/72,578.36
  6. Step 6: Final answer
    x = 42,288.02

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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.