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Finding the Fourth Proportional to 157,699.35, 217,630.26 and 86,083.20

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Solution

The fourth proportional to 157,699.35, 217,630.26 and 86,083.20 is: 118,797.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,699.35 : 217,630.26 = 86,083.20 : x
  2. Step 2: Convert to fraction form
    157,699.35/217,630.26 = 86,083.20/x
  3. Step 3: Cross multiply
    157,699.35x = 217,630.26 × 86,083.20
  4. Step 4: Simplify right side
    157,699.35x = 18,734,309,197.63
  5. Step 5: Solve for x
    x = 18,734,309,197.63/157,699.35
  6. Step 6: Final answer
    x = 118,797.63

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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.