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Finding the Fourth Proportional to 103,145.36, 154,571.96 and 43,921.36

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Solution

The fourth proportional to 103,145.36, 154,571.96 and 43,921.36 is: 65,819.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,145.36 : 154,571.96 = 43,921.36 : x
  2. Step 2: Convert to fraction form
    103,145.36/154,571.96 = 43,921.36/x
  3. Step 3: Cross multiply
    103,145.36x = 154,571.96 × 43,921.36
  4. Step 4: Simplify right side
    103,145.36x = 6,789,010,701.07
  5. Step 5: Solve for x
    x = 6,789,010,701.07/103,145.36
  6. Step 6: Final answer
    x = 65,819.84

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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.