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Finding the Fourth Proportional to 140,336.56, 193,599.48 and 80,686

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Solution

The fourth proportional to 140,336.56, 193,599.48 and 80,686 is: 111,309.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,336.56 : 193,599.48 = 80,686 : x
  2. Step 2: Convert to fraction form
    140,336.56/193,599.48 = 80,686/x
  3. Step 3: Cross multiply
    140,336.56x = 193,599.48 × 80,686
  4. Step 4: Simplify right side
    140,336.56x = 15,620,767,643.28
  5. Step 5: Solve for x
    x = 15,620,767,643.28/140,336.56
  6. Step 6: Final answer
    x = 111,309.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.