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Finding the Fourth Proportional to 181,713.80, 272,570.70 and 81,986.60

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Solution

The fourth proportional to 181,713.80, 272,570.70 and 81,986.60 is: 122,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,713.80 : 272,570.70 = 81,986.60 : x
  2. Step 2: Convert to fraction form
    181,713.80/272,570.70 = 81,986.60/x
  3. Step 3: Cross multiply
    181,713.80x = 272,570.70 × 81,986.60
  4. Step 4: Simplify right side
    181,713.80x = 22,347,144,952.62
  5. Step 5: Solve for x
    x = 22,347,144,952.62/181,713.80
  6. Step 6: Final answer
    x = 122,979.90

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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.