Home / 81,376.20-122,064.30-68,254.20

Finding the Fourth Proportional to 81,376.20, 122,064.30 and 68,254.20

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Solution

The fourth proportional to 81,376.20, 122,064.30 and 68,254.20 is: 102,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,376.20 : 122,064.30 = 68,254.20 : x
  2. Step 2: Convert to fraction form
    81,376.20/122,064.30 = 68,254.20/x
  3. Step 3: Cross multiply
    81,376.20x = 122,064.30 × 68,254.20
  4. Step 4: Simplify right side
    81,376.20x = 8,331,401,145.06
  5. Step 5: Solve for x
    x = 8,331,401,145.06/81,376.20
  6. Step 6: Final answer
    x = 102,381.30

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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.