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Finding the Fourth Proportional to 128,859.08, 193,344.24 and 69,736.46

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Solution

The fourth proportional to 128,859.08, 193,344.24 and 69,736.46 is: 104,634.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,859.08 : 193,344.24 = 69,736.46 : x
  2. Step 2: Convert to fraction form
    128,859.08/193,344.24 = 69,736.46/x
  3. Step 3: Cross multiply
    128,859.08x = 193,344.24 × 69,736.46
  4. Step 4: Simplify right side
    128,859.08x = 13,483,142,858.99
  5. Step 5: Solve for x
    x = 13,483,142,858.99/128,859.08
  6. Step 6: Final answer
    x = 104,634.79

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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.