Home / 157,912.09-217,917.41-86,290.81

Finding the Fourth Proportional to 157,912.09, 217,917.41 and 86,290.81

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Solution

The fourth proportional to 157,912.09, 217,917.41 and 86,290.81 is: 119,080.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,912.09 : 217,917.41 = 86,290.81 : x
  2. Step 2: Convert to fraction form
    157,912.09/217,917.41 = 86,290.81/x
  3. Step 3: Cross multiply
    157,912.09x = 217,917.41 × 86,290.81
  4. Step 4: Simplify right side
    157,912.09x = 18,804,269,822.00
  5. Step 5: Solve for x
    x = 18,804,269,822.00/157,912.09
  6. Step 6: Final answer
    x = 119,080.62

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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.