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Finding the Fourth Proportional to 111,842.87, 154,338.53 and 60,855.80

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Solution

The fourth proportional to 111,842.87, 154,338.53 and 60,855.80 is: 83,978.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,842.87 : 154,338.53 = 60,855.80 : x
  2. Step 2: Convert to fraction form
    111,842.87/154,338.53 = 60,855.80/x
  3. Step 3: Cross multiply
    111,842.87x = 154,338.53 × 60,855.80
  4. Step 4: Simplify right side
    111,842.87x = 9,392,393,638.00
  5. Step 5: Solve for x
    x = 9,392,393,638.00/111,842.87
  6. Step 6: Final answer
    x = 83,978.48

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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.