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Finding the Fourth Proportional to 181,379.80, 271,940.10 and 81,458.20

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Solution

The fourth proportional to 181,379.80, 271,940.10 and 81,458.20 is: 122,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,379.80 : 271,940.10 = 81,458.20 : x
  2. Step 2: Convert to fraction form
    181,379.80/271,940.10 = 81,458.20/x
  3. Step 3: Cross multiply
    181,379.80x = 271,940.10 × 81,458.20
  4. Step 4: Simplify right side
    181,379.80x = 22,151,751,053.82
  5. Step 5: Solve for x
    x = 22,151,751,053.82/181,379.80
  6. Step 6: Final answer
    x = 122,129.10

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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.