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Finding the Fourth Proportional to 86,112.51, 118,785.72 and 53,790.94

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Solution

The fourth proportional to 86,112.51, 118,785.72 and 53,790.94 is: 74,200.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,112.51 : 118,785.72 = 53,790.94 : x
  2. Step 2: Convert to fraction form
    86,112.51/118,785.72 = 53,790.94/x
  3. Step 3: Cross multiply
    86,112.51x = 118,785.72 × 53,790.94
  4. Step 4: Simplify right side
    86,112.51x = 6,389,595,537.38
  5. Step 5: Solve for x
    x = 6,389,595,537.38/86,112.51
  6. Step 6: Final answer
    x = 74,200.55

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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.