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Finding the Fourth Proportional to 86,571.27, 129,870.57 and 36,651.68

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Solution

The fourth proportional to 86,571.27, 129,870.57 and 36,651.68 is: 54,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,571.27 : 129,870.57 = 36,651.68 : x
  2. Step 2: Convert to fraction form
    86,571.27/129,870.57 = 36,651.68/x
  3. Step 3: Cross multiply
    86,571.27x = 129,870.57 × 36,651.68
  4. Step 4: Simplify right side
    86,571.27x = 4,759,973,923.70
  5. Step 5: Solve for x
    x = 4,759,973,923.70/86,571.27
  6. Step 6: Final answer
    x = 54,983.30

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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.