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Finding the Fourth Proportional to 228,408.24, 342,635.16 and 78,628.70

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Solution

The fourth proportional to 228,408.24, 342,635.16 and 78,628.70 is: 117,950.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,408.24 : 342,635.16 = 78,628.70 : x
  2. Step 2: Convert to fraction form
    228,408.24/342,635.16 = 78,628.70/x
  3. Step 3: Cross multiply
    228,408.24x = 342,635.16 × 78,628.70
  4. Step 4: Simplify right side
    228,408.24x = 26,940,957,205.09
  5. Step 5: Solve for x
    x = 26,940,957,205.09/228,408.24
  6. Step 6: Final answer
    x = 117,950.90

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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.