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Finding the Fourth Proportional to 188,555.68, 260,213.52 and 103,679.20

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Solution

The fourth proportional to 188,555.68, 260,213.52 and 103,679.20 is: 143,080.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,555.68 : 260,213.52 = 103,679.20 : x
  2. Step 2: Convert to fraction form
    188,555.68/260,213.52 = 103,679.20/x
  3. Step 3: Cross multiply
    188,555.68x = 260,213.52 × 103,679.20
  4. Step 4: Simplify right side
    188,555.68x = 26,978,729,582.78
  5. Step 5: Solve for x
    x = 26,978,729,582.78/188,555.68
  6. Step 6: Final answer
    x = 143,080.97

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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.