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Finding the Fourth Proportional to 202,486.40, 303,729.60 and 84,118.40

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Solution

The fourth proportional to 202,486.40, 303,729.60 and 84,118.40 is: 126,177.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,486.40 : 303,729.60 = 84,118.40 : x
  2. Step 2: Convert to fraction form
    202,486.40/303,729.60 = 84,118.40/x
  3. Step 3: Cross multiply
    202,486.40x = 303,729.60 × 84,118.40
  4. Step 4: Simplify right side
    202,486.40x = 25,549,247,984.64
  5. Step 5: Solve for x
    x = 25,549,247,984.64/202,486.40
  6. Step 6: Final answer
    x = 126,177.60

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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.