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Finding the Fourth Proportional to 135,074.64, 186,397.56 and 78,481.56

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Solution

The fourth proportional to 135,074.64, 186,397.56 and 78,481.56 is: 108,301.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,074.64 : 186,397.56 = 78,481.56 : x
  2. Step 2: Convert to fraction form
    135,074.64/186,397.56 = 78,481.56/x
  3. Step 3: Cross multiply
    135,074.64x = 186,397.56 × 78,481.56
  4. Step 4: Simplify right side
    135,074.64x = 14,628,771,288.99
  5. Step 5: Solve for x
    x = 14,628,771,288.99/135,074.64
  6. Step 6: Final answer
    x = 108,301.39

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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.