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Finding the Fourth Proportional to 71,803.89, 107,705.84 and 19,212.03

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Solution

The fourth proportional to 71,803.89, 107,705.84 and 19,212.03 is: 28,818.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,803.89 : 107,705.84 = 19,212.03 : x
  2. Step 2: Convert to fraction form
    71,803.89/107,705.84 = 19,212.03/x
  3. Step 3: Cross multiply
    71,803.89x = 107,705.84 × 19,212.03
  4. Step 4: Simplify right side
    71,803.89x = 2,069,247,733.20
  5. Step 5: Solve for x
    x = 2,069,247,733.20/71,803.89
  6. Step 6: Final answer
    x = 28,818.05

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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.