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Finding the Fourth Proportional to 70,005.21, 104,965.59 and 27,891.80

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Solution

The fourth proportional to 70,005.21, 104,965.59 and 27,891.80 is: 41,820.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,005.21 : 104,965.59 = 27,891.80 : x
  2. Step 2: Convert to fraction form
    70,005.21/104,965.59 = 27,891.80/x
  3. Step 3: Cross multiply
    70,005.21x = 104,965.59 × 27,891.80
  4. Step 4: Simplify right side
    70,005.21x = 2,927,678,718.33
  5. Step 5: Solve for x
    x = 2,927,678,718.33/70,005.21
  6. Step 6: Final answer
    x = 41,820.87

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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.