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Finding the Fourth Proportional to 209,653.59, 289,283.51 and 123,639.56

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Solution

The fourth proportional to 209,653.59, 289,283.51 and 123,639.56 is: 170,599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,653.59 : 289,283.51 = 123,639.56 : x
  2. Step 2: Convert to fraction form
    209,653.59/289,283.51 = 123,639.56/x
  3. Step 3: Cross multiply
    209,653.59x = 289,283.51 × 123,639.56
  4. Step 4: Simplify right side
    209,653.59x = 35,766,883,827.04
  5. Step 5: Solve for x
    x = 35,766,883,827.04/209,653.59
  6. Step 6: Final answer
    x = 170,599.91

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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.