Home / 128,301.05-192,626.09-72,180.65

Finding the Fourth Proportional to 128,301.05, 192,626.09 and 72,180.65

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Solution

The fourth proportional to 128,301.05, 192,626.09 and 72,180.65 is: 108,369.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,301.05 : 192,626.09 = 72,180.65 : x
  2. Step 2: Convert to fraction form
    128,301.05/192,626.09 = 72,180.65/x
  3. Step 3: Cross multiply
    128,301.05x = 192,626.09 × 72,180.65
  4. Step 4: Simplify right side
    128,301.05x = 13,903,876,383.16
  5. Step 5: Solve for x
    x = 13,903,876,383.16/128,301.05
  6. Step 6: Final answer
    x = 108,369.16

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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.