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Finding the Fourth Proportional to 173,540.78, 260,260.10 and 78,716.10

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Solution

The fourth proportional to 173,540.78, 260,260.10 and 78,716.10 is: 118,050.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,540.78 : 260,260.10 = 78,716.10 : x
  2. Step 2: Convert to fraction form
    173,540.78/260,260.10 = 78,716.10/x
  3. Step 3: Cross multiply
    173,540.78x = 260,260.10 × 78,716.10
  4. Step 4: Simplify right side
    173,540.78x = 20,486,659,664.03
  5. Step 5: Solve for x
    x = 20,486,659,664.03/173,540.78
  6. Step 6: Final answer
    x = 118,050.99

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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.