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Finding the Fourth Proportional to 120,630.33, 180,760.97 and 64,478.43

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Solution

The fourth proportional to 120,630.33, 180,760.97 and 64,478.43 is: 96,619.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,630.33 : 180,760.97 = 64,478.43 : x
  2. Step 2: Convert to fraction form
    120,630.33/180,760.97 = 64,478.43/x
  3. Step 3: Cross multiply
    120,630.33x = 180,760.97 × 64,478.43
  4. Step 4: Simplify right side
    120,630.33x = 11,655,183,712.07
  5. Step 5: Solve for x
    x = 11,655,183,712.07/120,630.33
  6. Step 6: Final answer
    x = 96,619.02

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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.