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Finding the Fourth Proportional to 181,491.20, 272,236.80 and 131,724.80

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Solution

The fourth proportional to 181,491.20, 272,236.80 and 131,724.80 is: 197,587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,491.20 : 272,236.80 = 131,724.80 : x
  2. Step 2: Convert to fraction form
    181,491.20/272,236.80 = 131,724.80/x
  3. Step 3: Cross multiply
    181,491.20x = 272,236.80 × 131,724.80
  4. Step 4: Simplify right side
    181,491.20x = 35,860,338,032.64
  5. Step 5: Solve for x
    x = 35,860,338,032.64/181,491.20
  6. Step 6: Final answer
    x = 197,587.20

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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.