Home / 120,115.45-165,762.39-66,401.29

Finding the Fourth Proportional to 120,115.45, 165,762.39 and 66,401.29

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Solution

The fourth proportional to 120,115.45, 165,762.39 and 66,401.29 is: 91,635.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,115.45 : 165,762.39 = 66,401.29 : x
  2. Step 2: Convert to fraction form
    120,115.45/165,762.39 = 66,401.29/x
  3. Step 3: Cross multiply
    120,115.45x = 165,762.39 × 66,401.29
  4. Step 4: Simplify right side
    120,115.45x = 11,006,836,529.48
  5. Step 5: Solve for x
    x = 11,006,836,529.48/120,115.45
  6. Step 6: Final answer
    x = 91,635.48

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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.