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Finding the Fourth Proportional to 209,980.69, 289,777.94 and 114,487.76

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Solution

The fourth proportional to 209,980.69, 289,777.94 and 114,487.76 is: 157,995.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,980.69 : 289,777.94 = 114,487.76 : x
  2. Step 2: Convert to fraction form
    209,980.69/289,777.94 = 114,487.76/x
  3. Step 3: Cross multiply
    209,980.69x = 289,777.94 × 114,487.76
  4. Step 4: Simplify right side
    209,980.69x = 33,176,027,829.35
  5. Step 5: Solve for x
    x = 33,176,027,829.35/209,980.69
  6. Step 6: Final answer
    x = 157,995.61

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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.