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Finding the Fourth Proportional to 218,047.20, 327,216.60 and 99,657.60

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Solution

The fourth proportional to 218,047.20, 327,216.60 and 99,657.60 is: 149,553.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,047.20 : 327,216.60 = 99,657.60 : x
  2. Step 2: Convert to fraction form
    218,047.20/327,216.60 = 99,657.60/x
  3. Step 3: Cross multiply
    218,047.20x = 327,216.60 × 99,657.60
  4. Step 4: Simplify right side
    218,047.20x = 32,609,621,036.16
  5. Step 5: Solve for x
    x = 32,609,621,036.16/218,047.20
  6. Step 6: Final answer
    x = 149,553.04

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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.