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Finding the Fourth Proportional to 308,022.12, 425,025.36 and 172,039.32

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Solution

The fourth proportional to 308,022.12, 425,025.36 and 172,039.32 is: 237,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,022.12 : 425,025.36 = 172,039.32 : x
  2. Step 2: Convert to fraction form
    308,022.12/425,025.36 = 172,039.32/x
  3. Step 3: Cross multiply
    308,022.12x = 425,025.36 × 172,039.32
  4. Step 4: Simplify right side
    308,022.12x = 73,121,073,917.16
  5. Step 5: Solve for x
    x = 73,121,073,917.16/308,022.12
  6. Step 6: Final answer
    x = 237,389.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.