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Finding the Fourth Proportional to 209,391.66, 289,011.81 and 118,800.66

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Solution

The fourth proportional to 209,391.66, 289,011.81 and 118,800.66 is: 163,974.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,391.66 : 289,011.81 = 118,800.66 : x
  2. Step 2: Convert to fraction form
    209,391.66/289,011.81 = 118,800.66/x
  3. Step 3: Cross multiply
    209,391.66x = 289,011.81 × 118,800.66
  4. Step 4: Simplify right side
    209,391.66x = 34,334,793,775.79
  5. Step 5: Solve for x
    x = 34,334,793,775.79/209,391.66
  6. Step 6: Final answer
    x = 163,974.03

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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.