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Finding the Fourth Proportional to 181,661.19, 272,477.79 and 80,490.57

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Solution

The fourth proportional to 181,661.19, 272,477.79 and 80,490.57 is: 120,729.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,661.19 : 272,477.79 = 80,490.57 : x
  2. Step 2: Convert to fraction form
    181,661.19/272,477.79 = 80,490.57/x
  3. Step 3: Cross multiply
    181,661.19x = 272,477.79 × 80,490.57
  4. Step 4: Simplify right side
    181,661.19x = 21,931,892,629.44
  5. Step 5: Solve for x
    x = 21,931,892,629.44/181,661.19
  6. Step 6: Final answer
    x = 120,729.65

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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.