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Finding the Fourth Proportional to 98,336.40, 135,596.88 and 66,450

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Solution

The fourth proportional to 98,336.40, 135,596.88 and 66,450 is: 91,628.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,336.40 : 135,596.88 = 66,450 : x
  2. Step 2: Convert to fraction form
    98,336.40/135,596.88 = 66,450/x
  3. Step 3: Cross multiply
    98,336.40x = 135,596.88 × 66,450
  4. Step 4: Simplify right side
    98,336.40x = 9,010,412,676
  5. Step 5: Solve for x
    x = 9,010,412,676/98,336.40
  6. Step 6: Final answer
    x = 91,628.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.