Home / 128,869.10-192,975.60-122,964.20

Finding the Fourth Proportional to 128,869.10, 192,975.60 and 122,964.20

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Solution

The fourth proportional to 128,869.10, 192,975.60 and 122,964.20 is: 184,133.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,869.10 : 192,975.60 = 122,964.20 : x
  2. Step 2: Convert to fraction form
    128,869.10/192,975.60 = 122,964.20/x
  3. Step 3: Cross multiply
    128,869.10x = 192,975.60 × 122,964.20
  4. Step 4: Simplify right side
    128,869.10x = 23,729,090,273.52
  5. Step 5: Solve for x
    x = 23,729,090,273.52/128,869.10
  6. Step 6: Final answer
    x = 184,133.28

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1.5x scale

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.