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Finding the Fourth Proportional to 139,676.50, 192,749.88 and 76,012.93

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Solution

The fourth proportional to 139,676.50, 192,749.88 and 76,012.93 is: 104,895.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,676.50 : 192,749.88 = 76,012.93 : x
  2. Step 2: Convert to fraction form
    139,676.50/192,749.88 = 76,012.93/x
  3. Step 3: Cross multiply
    139,676.50x = 192,749.88 × 76,012.93
  4. Step 4: Simplify right side
    139,676.50x = 14,651,483,234.36
  5. Step 5: Solve for x
    x = 14,651,483,234.36/139,676.50
  6. Step 6: Final answer
    x = 104,895.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.