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Finding the Fourth Proportional to 86,390.93, 129,532.93 and 33,738.50

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Solution

The fourth proportional to 86,390.93, 129,532.93 and 33,738.50 is: 50,586.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.93 : 129,532.93 = 33,738.50 : x
  2. Step 2: Convert to fraction form
    86,390.93/129,532.93 = 33,738.50/x
  3. Step 3: Cross multiply
    86,390.93x = 129,532.93 × 33,738.50
  4. Step 4: Simplify right side
    86,390.93x = 4,370,246,758.81
  5. Step 5: Solve for x
    x = 4,370,246,758.81/86,390.93
  6. Step 6: Final answer
    x = 50,586.87

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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.