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Finding the Fourth Proportional to 128,361.40, 192,023.70 and 111,023.80

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Solution

The fourth proportional to 128,361.40, 192,023.70 and 111,023.80 is: 166,087.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,361.40 : 192,023.70 = 111,023.80 : x
  2. Step 2: Convert to fraction form
    128,361.40/192,023.70 = 111,023.80/x
  3. Step 3: Cross multiply
    128,361.40x = 192,023.70 × 111,023.80
  4. Step 4: Simplify right side
    128,361.40x = 21,319,200,864.06
  5. Step 5: Solve for x
    x = 21,319,200,864.06/128,361.40
  6. Step 6: Final answer
    x = 166,087.32

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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.