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Finding the Fourth Proportional to 157,720.37, 217,657.83 and 86,100.92

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Solution

The fourth proportional to 157,720.37, 217,657.83 and 86,100.92 is: 118,821.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,720.37 : 217,657.83 = 86,100.92 : x
  2. Step 2: Convert to fraction form
    157,720.37/217,657.83 = 86,100.92/x
  3. Step 3: Cross multiply
    157,720.37x = 217,657.83 × 86,100.92
  4. Step 4: Simplify right side
    157,720.37x = 18,740,540,683.34
  5. Step 5: Solve for x
    x = 18,740,540,683.34/157,720.37
  6. Step 6: Final answer
    x = 118,821.31

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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.