Home / 115,214.20-172,821.30-108,653.20

Finding the Fourth Proportional to 115,214.20, 172,821.30 and 108,653.20

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Solution

The fourth proportional to 115,214.20, 172,821.30 and 108,653.20 is: 162,979.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,214.20 : 172,821.30 = 108,653.20 : x
  2. Step 2: Convert to fraction form
    115,214.20/172,821.30 = 108,653.20/x
  3. Step 3: Cross multiply
    115,214.20x = 172,821.30 × 108,653.20
  4. Step 4: Simplify right side
    115,214.20x = 18,777,587,273.16
  5. Step 5: Solve for x
    x = 18,777,587,273.16/115,214.20
  6. Step 6: Final answer
    x = 162,979.80

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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.