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Finding the Fourth Proportional to 161,012.80, 241,519.20 and 81,296.65

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Solution

The fourth proportional to 161,012.80, 241,519.20 and 81,296.65 is: 121,944.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,012.80 : 241,519.20 = 81,296.65 : x
  2. Step 2: Convert to fraction form
    161,012.80/241,519.20 = 81,296.65/x
  3. Step 3: Cross multiply
    161,012.80x = 241,519.20 × 81,296.65
  4. Step 4: Simplify right side
    161,012.80x = 19,634,701,870.68
  5. Step 5: Solve for x
    x = 19,634,701,870.68/161,012.80
  6. Step 6: Final answer
    x = 121,944.98

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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.