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Finding the Fourth Proportional to 193,030.80, 289,538.56 and 80,682

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Solution

The fourth proportional to 193,030.80, 289,538.56 and 80,682 is: 121,019.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,030.80 : 289,538.56 = 80,682 : x
  2. Step 2: Convert to fraction form
    193,030.80/289,538.56 = 80,682/x
  3. Step 3: Cross multiply
    193,030.80x = 289,538.56 × 80,682
  4. Step 4: Simplify right side
    193,030.80x = 23,360,550,097.92
  5. Step 5: Solve for x
    x = 23,360,550,097.92/193,030.80
  6. Step 6: Final answer
    x = 121,019.81

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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.