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Finding the Fourth Proportional to 128,540.60, 192,884.67 and 100,381.60

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Solution

The fourth proportional to 128,540.60, 192,884.67 and 100,381.60 is: 150,630.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,540.60 : 192,884.67 = 100,381.60 : x
  2. Step 2: Convert to fraction form
    128,540.60/192,884.67 = 100,381.60/x
  3. Step 3: Cross multiply
    128,540.60x = 192,884.67 × 100,381.60
  4. Step 4: Simplify right side
    128,540.60x = 19,362,071,790.07
  5. Step 5: Solve for x
    x = 19,362,071,790.07/128,540.60
  6. Step 6: Final answer
    x = 150,630.01

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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.