Home / 68,528.20-102,638.70-40,880.20

Finding the Fourth Proportional to 68,528.20, 102,638.70 and 40,880.20

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Solution

The fourth proportional to 68,528.20, 102,638.70 and 40,880.20 is: 61,228.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,528.20 : 102,638.70 = 40,880.20 : x
  2. Step 2: Convert to fraction form
    68,528.20/102,638.70 = 40,880.20/x
  3. Step 3: Cross multiply
    68,528.20x = 102,638.70 × 40,880.20
  4. Step 4: Simplify right side
    68,528.20x = 4,195,890,583.74
  5. Step 5: Solve for x
    x = 4,195,890,583.74/68,528.20
  6. Step 6: Final answer
    x = 61,228.67

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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.