Home / 129,676.24-178,909.32-105,761.36

Finding the Fourth Proportional to 129,676.24, 178,909.32 and 105,761.36

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Solution

The fourth proportional to 129,676.24, 178,909.32 and 105,761.36 is: 145,914.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,676.24 : 178,909.32 = 105,761.36 : x
  2. Step 2: Convert to fraction form
    129,676.24/178,909.32 = 105,761.36/x
  3. Step 3: Cross multiply
    129,676.24x = 178,909.32 × 105,761.36
  4. Step 4: Simplify right side
    129,676.24x = 18,921,692,999.88
  5. Step 5: Solve for x
    x = 18,921,692,999.88/129,676.24
  6. Step 6: Final answer
    x = 145,914.88

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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.