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Finding the Fourth Proportional to 72,447.89, 108,662.60 and 28,044.26

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Solution

The fourth proportional to 72,447.89, 108,662.60 and 28,044.26 is: 42,062.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,447.89 : 108,662.60 = 28,044.26 : x
  2. Step 2: Convert to fraction form
    72,447.89/108,662.60 = 28,044.26/x
  3. Step 3: Cross multiply
    72,447.89x = 108,662.60 × 28,044.26
  4. Step 4: Simplify right side
    72,447.89x = 3,047,362,206.68
  5. Step 5: Solve for x
    x = 3,047,362,206.68/72,447.89
  6. Step 6: Final answer
    x = 42,062.82

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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.