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Finding the Fourth Proportional to 138,216.69, 190,797.89 and 92,920.95

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Solution

The fourth proportional to 138,216.69, 190,797.89 and 92,920.95 is: 128,270.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,216.69 : 190,797.89 = 92,920.95 : x
  2. Step 2: Convert to fraction form
    138,216.69/190,797.89 = 92,920.95/x
  3. Step 3: Cross multiply
    138,216.69x = 190,797.89 × 92,920.95
  4. Step 4: Simplify right side
    138,216.69x = 17,729,120,732.19
  5. Step 5: Solve for x
    x = 17,729,120,732.19/138,216.69
  6. Step 6: Final answer
    x = 128,270.48

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1.5x scale

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.