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Finding the Fourth Proportional to 125,791.28, 188,738.76 and 92,678.48

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Solution

The fourth proportional to 125,791.28, 188,738.76 and 92,678.48 is: 139,055.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,791.28 : 188,738.76 = 92,678.48 : x
  2. Step 2: Convert to fraction form
    125,791.28/188,738.76 = 92,678.48/x
  3. Step 3: Cross multiply
    125,791.28x = 188,738.76 × 92,678.48
  4. Step 4: Simplify right side
    125,791.28x = 17,492,021,393.88
  5. Step 5: Solve for x
    x = 17,492,021,393.88/125,791.28
  6. Step 6: Final answer
    x = 139,055.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.