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Finding the Fourth Proportional to 188,690.88, 260,285.28 and 117,912

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Solution

The fourth proportional to 188,690.88, 260,285.28 and 117,912 is: 162,650.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,690.88 : 260,285.28 = 117,912 : x
  2. Step 2: Convert to fraction form
    188,690.88/260,285.28 = 117,912/x
  3. Step 3: Cross multiply
    188,690.88x = 260,285.28 × 117,912
  4. Step 4: Simplify right side
    188,690.88x = 30,690,757,935.36
  5. Step 5: Solve for x
    x = 30,690,757,935.36/188,690.88
  6. Step 6: Final answer
    x = 162,650.99

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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.