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Finding the Fourth Proportional to 209,047.73, 313,571.58 and 90,716.45

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Solution

The fourth proportional to 209,047.73, 313,571.58 and 90,716.45 is: 136,074.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,047.73 : 313,571.58 = 90,716.45 : x
  2. Step 2: Convert to fraction form
    209,047.73/313,571.58 = 90,716.45/x
  3. Step 3: Cross multiply
    209,047.73x = 313,571.58 × 90,716.45
  4. Step 4: Simplify right side
    209,047.73x = 28,446,098,990.63
  5. Step 5: Solve for x
    x = 28,446,098,990.63/209,047.73
  6. Step 6: Final answer
    x = 136,074.66

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1.5x scale

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.