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Finding the Fourth Proportional to 72,647.28, 108,942.48 and 28,268.16

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Solution

The fourth proportional to 72,647.28, 108,942.48 and 28,268.16 is: 42,391.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,647.28 : 108,942.48 = 28,268.16 : x
  2. Step 2: Convert to fraction form
    72,647.28/108,942.48 = 28,268.16/x
  3. Step 3: Cross multiply
    72,647.28x = 108,942.48 × 28,268.16
  4. Step 4: Simplify right side
    72,647.28x = 3,079,603,455.44
  5. Step 5: Solve for x
    x = 3,079,603,455.44/72,647.28
  6. Step 6: Final answer
    x = 42,391.17

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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.