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Finding the Fourth Proportional to 157,722.36, 217,656.30 and 86,101.56

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Solution

The fourth proportional to 157,722.36, 217,656.30 and 86,101.56 is: 118,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,722.36 : 217,656.30 = 86,101.56 : x
  2. Step 2: Convert to fraction form
    157,722.36/217,656.30 = 86,101.56/x
  3. Step 3: Cross multiply
    157,722.36x = 217,656.30 × 86,101.56
  4. Step 4: Simplify right side
    157,722.36x = 18,740,546,973.83
  5. Step 5: Solve for x
    x = 18,740,546,973.83/157,722.36
  6. Step 6: Final answer
    x = 118,819.85

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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.