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Finding the Fourth Proportional to 188,634.88, 260,184.32 and 128,100.44

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Solution

The fourth proportional to 188,634.88, 260,184.32 and 128,100.44 is: 176,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,634.88 : 260,184.32 = 128,100.44 : x
  2. Step 2: Convert to fraction form
    188,634.88/260,184.32 = 128,100.44/x
  3. Step 3: Cross multiply
    188,634.88x = 260,184.32 × 128,100.44
  4. Step 4: Simplify right side
    188,634.88x = 33,329,723,931.68
  5. Step 5: Solve for x
    x = 33,329,723,931.68/188,634.88
  6. Step 6: Final answer
    x = 176,689.09

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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.