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Finding the Fourth Proportional to 72,647.89, 108,865.22 and 51,628.39

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Solution

The fourth proportional to 72,647.89, 108,865.22 and 51,628.39 is: 77,366.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,647.89 : 108,865.22 = 51,628.39 : x
  2. Step 2: Convert to fraction form
    72,647.89/108,865.22 = 51,628.39/x
  3. Step 3: Cross multiply
    72,647.89x = 108,865.22 × 51,628.39
  4. Step 4: Simplify right side
    72,647.89x = 5,620,535,505.29
  5. Step 5: Solve for x
    x = 5,620,535,505.29/72,647.89
  6. Step 6: Final answer
    x = 77,366.81

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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.