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Finding the Fourth Proportional to 128,889.04, 193,367.04 and 40,144

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Solution

The fourth proportional to 128,889.04, 193,367.04 and 40,144 is: 60,226.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,889.04 : 193,367.04 = 40,144 : x
  2. Step 2: Convert to fraction form
    128,889.04/193,367.04 = 40,144/x
  3. Step 3: Cross multiply
    128,889.04x = 193,367.04 × 40,144
  4. Step 4: Simplify right side
    128,889.04x = 7,762,526,453.76
  5. Step 5: Solve for x
    x = 7,762,526,453.76/128,889.04
  6. Step 6: Final answer
    x = 60,226.43

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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.