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Finding the Fourth Proportional to 202,421.20, 303,145.80 and 108,720.40

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Solution

The fourth proportional to 202,421.20, 303,145.80 and 108,720.40 is: 162,819.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,421.20 : 303,145.80 = 108,720.40 : x
  2. Step 2: Convert to fraction form
    202,421.20/303,145.80 = 108,720.40/x
  3. Step 3: Cross multiply
    202,421.20x = 303,145.80 × 108,720.40
  4. Step 4: Simplify right side
    202,421.20x = 32,958,132,634.32
  5. Step 5: Solve for x
    x = 32,958,132,634.32/202,421.20
  6. Step 6: Final answer
    x = 162,819.57

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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.