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Finding the Fourth Proportional to 157,644.15, 217,553.54 and 86,028.79

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Solution

The fourth proportional to 157,644.15, 217,553.54 and 86,028.79 is: 118,722.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,644.15 : 217,553.54 = 86,028.79 : x
  2. Step 2: Convert to fraction form
    157,644.15/217,553.54 = 86,028.79/x
  3. Step 3: Cross multiply
    157,644.15x = 217,553.54 × 86,028.79
  4. Step 4: Simplify right side
    157,644.15x = 18,715,867,477.60
  5. Step 5: Solve for x
    x = 18,715,867,477.60/157,644.15
  6. Step 6: Final answer
    x = 118,722.25

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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.