Home / 68,143.11-102,219.85-20,762.25

Finding the Fourth Proportional to 68,143.11, 102,219.85 and 20,762.25

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Solution

The fourth proportional to 68,143.11, 102,219.85 and 20,762.25 is: 31,144.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,143.11 : 102,219.85 = 20,762.25 : x
  2. Step 2: Convert to fraction form
    68,143.11/102,219.85 = 20,762.25/x
  3. Step 3: Cross multiply
    68,143.11x = 102,219.85 × 20,762.25
  4. Step 4: Simplify right side
    68,143.11x = 2,122,313,723.29
  5. Step 5: Solve for x
    x = 2,122,313,723.29/68,143.11
  6. Step 6: Final answer
    x = 31,144.95

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1.5x scale

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.