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Finding the Fourth Proportional to 72,361.84, 108,709.62 and 69,372.54

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Solution

The fourth proportional to 72,361.84, 108,709.62 and 69,372.54 is: 104,218.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,361.84 : 108,709.62 = 69,372.54 : x
  2. Step 2: Convert to fraction form
    72,361.84/108,709.62 = 69,372.54/x
  3. Step 3: Cross multiply
    72,361.84x = 108,709.62 × 69,372.54
  4. Step 4: Simplify right side
    72,361.84x = 7,541,461,918.29
  5. Step 5: Solve for x
    x = 7,541,461,918.29/72,361.84
  6. Step 6: Final answer
    x = 104,218.77

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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.