Home / 128,870.10-192,977.10-122,965.20

Finding the Fourth Proportional to 128,870.10, 192,977.10 and 122,965.20

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Solution

The fourth proportional to 128,870.10, 192,977.10 and 122,965.20 is: 184,134.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,870.10 : 192,977.10 = 122,965.20 : x
  2. Step 2: Convert to fraction form
    128,870.10/192,977.10 = 122,965.20/x
  3. Step 3: Cross multiply
    128,870.10x = 192,977.10 × 122,965.20
  4. Step 4: Simplify right side
    128,870.10x = 23,729,467,696.92
  5. Step 5: Solve for x
    x = 23,729,467,696.92/128,870.10
  6. Step 6: Final answer
    x = 184,134.78

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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.