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Finding the Fourth Proportional to 138,216.26, 190,797.29 and 92,920.51

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Solution

The fourth proportional to 138,216.26, 190,797.29 and 92,920.51 is: 128,269.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,216.26 : 190,797.29 = 92,920.51 : x
  2. Step 2: Convert to fraction form
    138,216.26/190,797.29 = 92,920.51/x
  3. Step 3: Cross multiply
    138,216.26x = 190,797.29 × 92,920.51
  4. Step 4: Simplify right side
    138,216.26x = 17,728,981,973.51
  5. Step 5: Solve for x
    x = 17,728,981,973.51/138,216.26
  6. Step 6: Final answer
    x = 128,269.87

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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.