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Finding the Fourth Proportional to 157,819.90, 217,796.16 and 86,201.12

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Solution

The fourth proportional to 157,819.90, 217,796.16 and 86,201.12 is: 118,960.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,819.90 : 217,796.16 = 86,201.12 : x
  2. Step 2: Convert to fraction form
    157,819.90/217,796.16 = 86,201.12/x
  3. Step 3: Cross multiply
    157,819.90x = 217,796.16 × 86,201.12
  4. Step 4: Simplify right side
    157,819.90x = 18,774,272,923.70
  5. Step 5: Solve for x
    x = 18,774,272,923.70/157,819.90
  6. Step 6: Final answer
    x = 118,960.11

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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.