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Finding the Fourth Proportional to 143,980.84, 198,698.97 and 80,330.94

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Solution

The fourth proportional to 143,980.84, 198,698.97 and 80,330.94 is: 110,859.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,980.84 : 198,698.97 = 80,330.94 : x
  2. Step 2: Convert to fraction form
    143,980.84/198,698.97 = 80,330.94/x
  3. Step 3: Cross multiply
    143,980.84x = 198,698.97 × 80,330.94
  4. Step 4: Simplify right side
    143,980.84x = 15,961,675,338.37
  5. Step 5: Solve for x
    x = 15,961,675,338.37/143,980.84
  6. Step 6: Final answer
    x = 110,859.72

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1.5x scale

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.