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Finding the Fourth Proportional to 130,388.66, 179,930.12 and 80,077.94

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Solution

The fourth proportional to 130,388.66, 179,930.12 and 80,077.94 is: 110,503.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,388.66 : 179,930.12 = 80,077.94 : x
  2. Step 2: Convert to fraction form
    130,388.66/179,930.12 = 80,077.94/x
  3. Step 3: Cross multiply
    130,388.66x = 179,930.12 × 80,077.94
  4. Step 4: Simplify right side
    130,388.66x = 14,408,433,353.55
  5. Step 5: Solve for x
    x = 14,408,433,353.55/130,388.66
  6. Step 6: Final answer
    x = 110,503.73

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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.