Home / 128,129.09-192,084.26-90,571.01

Finding the Fourth Proportional to 128,129.09, 192,084.26 and 90,571.01

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Solution

The fourth proportional to 128,129.09, 192,084.26 and 90,571.01 is: 135,779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,129.09 : 192,084.26 = 90,571.01 : x
  2. Step 2: Convert to fraction form
    128,129.09/192,084.26 = 90,571.01/x
  3. Step 3: Cross multiply
    128,129.09x = 192,084.26 × 90,571.01
  4. Step 4: Simplify right side
    128,129.09x = 17,397,265,609.96
  5. Step 5: Solve for x
    x = 17,397,265,609.96/128,129.09
  6. Step 6: Final answer
    x = 135,779.20

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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.