Home / 218,921.22-328,401.27-78,719.94

Finding the Fourth Proportional to 218,921.22, 328,401.27 and 78,719.94

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Solution

The fourth proportional to 218,921.22, 328,401.27 and 78,719.94 is: 118,086.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,921.22 : 328,401.27 = 78,719.94 : x
  2. Step 2: Convert to fraction form
    218,921.22/328,401.27 = 78,719.94/x
  3. Step 3: Cross multiply
    218,921.22x = 328,401.27 × 78,719.94
  4. Step 4: Simplify right side
    218,921.22x = 25,851,728,270.32
  5. Step 5: Solve for x
    x = 25,851,728,270.32/218,921.22
  6. Step 6: Final answer
    x = 118,086.90

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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.