Home / 128,989.70-192,983.96-113,075.02

Finding the Fourth Proportional to 128,989.70, 192,983.96 and 113,075.02

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Solution

The fourth proportional to 128,989.70, 192,983.96 and 113,075.02 is: 169,173.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,989.70 : 192,983.96 = 113,075.02 : x
  2. Step 2: Convert to fraction form
    128,989.70/192,983.96 = 113,075.02/x
  3. Step 3: Cross multiply
    128,989.70x = 192,983.96 × 113,075.02
  4. Step 4: Simplify right side
    128,989.70x = 21,821,664,936.91
  5. Step 5: Solve for x
    x = 21,821,664,936.91/128,989.70
  6. Step 6: Final answer
    x = 169,173.71

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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.