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Finding the Fourth Proportional to 72,662.52, 108,998.64 and 28,286.40

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Solution

The fourth proportional to 72,662.52, 108,998.64 and 28,286.40 is: 42,431.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,662.52 : 108,998.64 = 28,286.40 : x
  2. Step 2: Convert to fraction form
    72,662.52/108,998.64 = 28,286.40/x
  3. Step 3: Cross multiply
    72,662.52x = 108,998.64 × 28,286.40
  4. Step 4: Simplify right side
    72,662.52x = 3,083,179,130.50
  5. Step 5: Solve for x
    x = 3,083,179,130.50/72,662.52
  6. Step 6: Final answer
    x = 42,431.49

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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.