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Finding the Fourth Proportional to 157,879.03, 217,870.51 and 86,257.51

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Solution

The fourth proportional to 157,879.03, 217,870.51 and 86,257.51 is: 119,033.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,879.03 : 217,870.51 = 86,257.51 : x
  2. Step 2: Convert to fraction form
    157,879.03/217,870.51 = 86,257.51/x
  3. Step 3: Cross multiply
    157,879.03x = 217,870.51 × 86,257.51
  4. Step 4: Simplify right side
    157,879.03x = 18,792,967,695.03
  5. Step 5: Solve for x
    x = 18,792,967,695.03/157,879.03
  6. Step 6: Final answer
    x = 119,033.97

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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.