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Finding the Fourth Proportional to 157,872.51, 217,857.60 and 86,255.01

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Solution

The fourth proportional to 157,872.51, 217,857.60 and 86,255.01 is: 119,028.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,872.51 : 217,857.60 = 86,255.01 : x
  2. Step 2: Convert to fraction form
    157,872.51/217,857.60 = 86,255.01/x
  3. Step 3: Cross multiply
    157,872.51x = 217,857.60 × 86,255.01
  4. Step 4: Simplify right side
    157,872.51x = 18,791,309,466.58
  5. Step 5: Solve for x
    x = 18,791,309,466.58/157,872.51
  6. Step 6: Final answer
    x = 119,028.38

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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.