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Finding the Fourth Proportional to 209,286.41, 313,922.56 and 90,957.76

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Solution

The fourth proportional to 209,286.41, 313,922.56 and 90,957.76 is: 136,433.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,286.41 : 313,922.56 = 90,957.76 : x
  2. Step 2: Convert to fraction form
    209,286.41/313,922.56 = 90,957.76/x
  3. Step 3: Cross multiply
    209,286.41x = 313,922.56 × 90,957.76
  4. Step 4: Simplify right side
    209,286.41x = 28,553,692,871.07
  5. Step 5: Solve for x
    x = 28,553,692,871.07/209,286.41
  6. Step 6: Final answer
    x = 136,433.57

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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.