Home / 86,609.92-129,857.28-31,198.72

Finding the Fourth Proportional to 86,609.92, 129,857.28 and 31,198.72

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Solution

The fourth proportional to 86,609.92, 129,857.28 and 31,198.72 is: 46,777.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,609.92 : 129,857.28 = 31,198.72 : x
  2. Step 2: Convert to fraction form
    86,609.92/129,857.28 = 31,198.72/x
  3. Step 3: Cross multiply
    86,609.92x = 129,857.28 × 31,198.72
  4. Step 4: Simplify right side
    86,609.92x = 4,051,380,918.68
  5. Step 5: Solve for x
    x = 4,051,380,918.68/86,609.92
  6. Step 6: Final answer
    x = 46,777.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.