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Finding the Fourth Proportional to 129,753.34, 179,029.02 and 78,764.80

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Solution

The fourth proportional to 129,753.34, 179,029.02 and 78,764.80 is: 108,676.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,753.34 : 179,029.02 = 78,764.80 : x
  2. Step 2: Convert to fraction form
    129,753.34/179,029.02 = 78,764.80/x
  3. Step 3: Cross multiply
    129,753.34x = 179,029.02 × 78,764.80
  4. Step 4: Simplify right side
    129,753.34x = 14,101,184,954.50
  5. Step 5: Solve for x
    x = 14,101,184,954.50/129,753.34
  6. Step 6: Final answer
    x = 108,676.86

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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.