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Finding the Fourth Proportional to 81,060.99, 111,830.45 and 53,850.15

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Solution

The fourth proportional to 81,060.99, 111,830.45 and 53,850.15 is: 74,290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,060.99 : 111,830.45 = 53,850.15 : x
  2. Step 2: Convert to fraction form
    81,060.99/111,830.45 = 53,850.15/x
  3. Step 3: Cross multiply
    81,060.99x = 111,830.45 × 53,850.15
  4. Step 4: Simplify right side
    81,060.99x = 6,022,086,237.82
  5. Step 5: Solve for x
    x = 6,022,086,237.82/81,060.99
  6. Step 6: Final answer
    x = 74,290.81

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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.