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Finding the Fourth Proportional to 78,756.89, 108,682.11 and 44,769.09

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Solution

The fourth proportional to 78,756.89, 108,682.11 and 44,769.09 is: 61,779.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756.89 : 108,682.11 = 44,769.09 : x
  2. Step 2: Convert to fraction form
    78,756.89/108,682.11 = 44,769.09/x
  3. Step 3: Cross multiply
    78,756.89x = 108,682.11 × 44,769.09
  4. Step 4: Simplify right side
    78,756.89x = 4,865,599,163.98
  5. Step 5: Solve for x
    x = 4,865,599,163.98/78,756.89
  6. Step 6: Final answer
    x = 61,779.98

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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.