Home / 80,660.22-120,911.36-45,138.89

Finding the Fourth Proportional to 80,660.22, 120,911.36 and 45,138.89

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Solution

The fourth proportional to 80,660.22, 120,911.36 and 45,138.89 is: 67,664.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,660.22 : 120,911.36 = 45,138.89 : x
  2. Step 2: Convert to fraction form
    80,660.22/120,911.36 = 45,138.89/x
  3. Step 3: Cross multiply
    80,660.22x = 120,911.36 × 45,138.89
  4. Step 4: Simplify right side
    80,660.22x = 5,457,803,748.54
  5. Step 5: Solve for x
    x = 5,457,803,748.54/80,660.22
  6. Step 6: Final answer
    x = 67,664.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.