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Finding the Fourth Proportional to 168,403.20, 252,021.60 and 154,406.40

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Solution

The fourth proportional to 168,403.20, 252,021.60 and 154,406.40 is: 231,074.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,403.20 : 252,021.60 = 154,406.40 : x
  2. Step 2: Convert to fraction form
    168,403.20/252,021.60 = 154,406.40/x
  3. Step 3: Cross multiply
    168,403.20x = 252,021.60 × 154,406.40
  4. Step 4: Simplify right side
    168,403.20x = 38,913,747,978.24
  5. Step 5: Solve for x
    x = 38,913,747,978.24/168,403.20
  6. Step 6: Final answer
    x = 231,074.87

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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.