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Finding the Fourth Proportional to 71,291.43, 106,928.94 and 18,705.01

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Solution

The fourth proportional to 71,291.43, 106,928.94 and 18,705.01 is: 28,055.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,291.43 : 106,928.94 = 18,705.01 : x
  2. Step 2: Convert to fraction form
    71,291.43/106,928.94 = 18,705.01/x
  3. Step 3: Cross multiply
    71,291.43x = 106,928.94 × 18,705.01
  4. Step 4: Simplify right side
    71,291.43x = 2,000,106,891.99
  5. Step 5: Solve for x
    x = 2,000,106,891.99/71,291.43
  6. Step 6: Final answer
    x = 28,055.36

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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.