Home / 209,105.79-288,565.23-113,611.65

Finding the Fourth Proportional to 209,105.79, 288,565.23 and 113,611.65

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Solution

The fourth proportional to 209,105.79, 288,565.23 and 113,611.65 is: 156,783.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,105.79 : 288,565.23 = 113,611.65 : x
  2. Step 2: Convert to fraction form
    209,105.79/288,565.23 = 113,611.65/x
  3. Step 3: Cross multiply
    209,105.79x = 288,565.23 × 113,611.65
  4. Step 4: Simplify right side
    209,105.79x = 32,784,371,912.93
  5. Step 5: Solve for x
    x = 32,784,371,912.93/209,105.79
  6. Step 6: Final answer
    x = 156,783.66

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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.