Home / 209,128.50-288,599.09-113,635.20

Finding the Fourth Proportional to 209,128.50, 288,599.09 and 113,635.20

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Solution

The fourth proportional to 209,128.50, 288,599.09 and 113,635.20 is: 156,817.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,128.50 : 288,599.09 = 113,635.20 : x
  2. Step 2: Convert to fraction form
    209,128.50/288,599.09 = 113,635.20/x
  3. Step 3: Cross multiply
    209,128.50x = 288,599.09 × 113,635.20
  4. Step 4: Simplify right side
    209,128.50x = 32,795,014,743.79
  5. Step 5: Solve for x
    x = 32,795,014,743.79/209,128.50
  6. Step 6: Final answer
    x = 156,817.53

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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.