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Finding the Fourth Proportional to 105,771.80, 158,664.90 and 30,891.80

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Solution

The fourth proportional to 105,771.80, 158,664.90 and 30,891.80 is: 46,339.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,771.80 : 158,664.90 = 30,891.80 : x
  2. Step 2: Convert to fraction form
    105,771.80/158,664.90 = 30,891.80/x
  3. Step 3: Cross multiply
    105,771.80x = 158,664.90 × 30,891.80
  4. Step 4: Simplify right side
    105,771.80x = 4,901,444,357.82
  5. Step 5: Solve for x
    x = 4,901,444,357.82/105,771.80
  6. Step 6: Final answer
    x = 46,339.80

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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.