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Finding the Fourth Proportional to 188,270.88, 259,815.63 and 103,389.76

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Solution

The fourth proportional to 188,270.88, 259,815.63 and 103,389.76 is: 142,678.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,270.88 : 259,815.63 = 103,389.76 : x
  2. Step 2: Convert to fraction form
    188,270.88/259,815.63 = 103,389.76/x
  3. Step 3: Cross multiply
    188,270.88x = 259,815.63 × 103,389.76
  4. Step 4: Simplify right side
    188,270.88x = 26,862,275,629.95
  5. Step 5: Solve for x
    x = 26,862,275,629.95/188,270.88
  6. Step 6: Final answer
    x = 142,678.87

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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.