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Finding the Fourth Proportional to 201,755.20, 302,661.60 and 68,641.60

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Solution

The fourth proportional to 201,755.20, 302,661.60 and 68,641.60 is: 102,972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,755.20 : 302,661.60 = 68,641.60 : x
  2. Step 2: Convert to fraction form
    201,755.20/302,661.60 = 68,641.60/x
  3. Step 3: Cross multiply
    201,755.20x = 302,661.60 × 68,641.60
  4. Step 4: Simplify right side
    201,755.20x = 20,775,176,482.56
  5. Step 5: Solve for x
    x = 20,775,176,482.56/201,755.20
  6. Step 6: Final answer
    x = 102,972.20

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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.