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Finding the Fourth Proportional to 128,239.02, 192,361.81 and 60,755.24

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Solution

The fourth proportional to 128,239.02, 192,361.81 and 60,755.24 is: 91,134.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,239.02 : 192,361.81 = 60,755.24 : x
  2. Step 2: Convert to fraction form
    128,239.02/192,361.81 = 60,755.24/x
  3. Step 3: Cross multiply
    128,239.02x = 192,361.81 × 60,755.24
  4. Step 4: Simplify right side
    128,239.02x = 11,686,986,971.58
  5. Step 5: Solve for x
    x = 11,686,986,971.58/128,239.02
  6. Step 6: Final answer
    x = 91,134.41

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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.