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Finding the Fourth Proportional to 157,725.66, 217,661.76 and 86,105.70

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Solution

The fourth proportional to 157,725.66, 217,661.76 and 86,105.70 is: 118,826.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,725.66 : 217,661.76 = 86,105.70 : x
  2. Step 2: Convert to fraction form
    157,725.66/217,661.76 = 86,105.70/x
  3. Step 3: Cross multiply
    157,725.66x = 217,661.76 × 86,105.70
  4. Step 4: Simplify right side
    157,725.66x = 18,741,918,208.03
  5. Step 5: Solve for x
    x = 18,741,918,208.03/157,725.66
  6. Step 6: Final answer
    x = 118,826.06

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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.