Home / 128,990.45-192,985.09-113,075.77

Finding the Fourth Proportional to 128,990.45, 192,985.09 and 113,075.77

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Solution

The fourth proportional to 128,990.45, 192,985.09 and 113,075.77 is: 169,174.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,990.45 : 192,985.09 = 113,075.77 : x
  2. Step 2: Convert to fraction form
    128,990.45/192,985.09 = 113,075.77/x
  3. Step 3: Cross multiply
    128,990.45x = 192,985.09 × 113,075.77
  4. Step 4: Simplify right side
    128,990.45x = 21,821,936,885.12
  5. Step 5: Solve for x
    x = 21,821,936,885.12/128,990.45
  6. Step 6: Final answer
    x = 169,174.83

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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.