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Finding the Fourth Proportional to 168,855.96, 253,344.66 and 78,978.84

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Solution

The fourth proportional to 168,855.96, 253,344.66 and 78,978.84 is: 118,496.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,855.96 : 253,344.66 = 78,978.84 : x
  2. Step 2: Convert to fraction form
    168,855.96/253,344.66 = 78,978.84/x
  3. Step 3: Cross multiply
    168,855.96x = 253,344.66 × 78,978.84
  4. Step 4: Simplify right side
    168,855.96x = 20,008,867,366.99
  5. Step 5: Solve for x
    x = 20,008,867,366.99/168,855.96
  6. Step 6: Final answer
    x = 118,496.66

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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.