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Finding the Fourth Proportional to 99,680.40, 149,520.60 and 68,187.60

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Solution

The fourth proportional to 99,680.40, 149,520.60 and 68,187.60 is: 102,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,680.40 : 149,520.60 = 68,187.60 : x
  2. Step 2: Convert to fraction form
    99,680.40/149,520.60 = 68,187.60/x
  3. Step 3: Cross multiply
    99,680.40x = 149,520.60 × 68,187.60
  4. Step 4: Simplify right side
    99,680.40x = 10,195,450,864.56
  5. Step 5: Solve for x
    x = 10,195,450,864.56/99,680.40
  6. Step 6: Final answer
    x = 102,281.40

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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.