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Finding the Fourth Proportional to 181,391.40, 250,389.89 and 120,939.95

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Solution

The fourth proportional to 181,391.40, 250,389.89 and 120,939.95 is: 166,943.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,391.40 : 250,389.89 = 120,939.95 : x
  2. Step 2: Convert to fraction form
    181,391.40/250,389.89 = 120,939.95/x
  3. Step 3: Cross multiply
    181,391.40x = 250,389.89 × 120,939.95
  4. Step 4: Simplify right side
    181,391.40x = 30,282,140,777.11
  5. Step 5: Solve for x
    x = 30,282,140,777.11/181,391.40
  6. Step 6: Final answer
    x = 166,943.64

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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.