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Finding the Fourth Proportional to 128,092.21, 192,147.54 and 36,903.88

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Solution

The fourth proportional to 128,092.21, 192,147.54 and 36,903.88 is: 55,358.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,092.21 : 192,147.54 = 36,903.88 : x
  2. Step 2: Convert to fraction form
    128,092.21/192,147.54 = 36,903.88/x
  3. Step 3: Cross multiply
    128,092.21x = 192,147.54 × 36,903.88
  4. Step 4: Simplify right side
    128,092.21x = 7,090,989,527.42
  5. Step 5: Solve for x
    x = 7,090,989,527.42/128,092.21
  6. Step 6: Final answer
    x = 55,358.48

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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.