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Finding the Fourth Proportional to 157,999.54, 218,039.34 and 86,379.54

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Solution

The fourth proportional to 157,999.54, 218,039.34 and 86,379.54 is: 119,203.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,999.54 : 218,039.34 = 86,379.54 : x
  2. Step 2: Convert to fraction form
    157,999.54/218,039.34 = 86,379.54/x
  3. Step 3: Cross multiply
    157,999.54x = 218,039.34 × 86,379.54
  4. Step 4: Simplify right side
    157,999.54x = 18,834,138,010.62
  5. Step 5: Solve for x
    x = 18,834,138,010.62/157,999.54
  6. Step 6: Final answer
    x = 119,203.75

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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.