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Finding the Fourth Proportional to 192,786.90, 265,685.31 and 138,980.22

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Solution

The fourth proportional to 192,786.90, 265,685.31 and 138,980.22 is: 191,532.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,786.90 : 265,685.31 = 138,980.22 : x
  2. Step 2: Convert to fraction form
    192,786.90/265,685.31 = 138,980.22/x
  3. Step 3: Cross multiply
    192,786.90x = 265,685.31 × 138,980.22
  4. Step 4: Simplify right side
    192,786.90x = 36,925,002,834.57
  5. Step 5: Solve for x
    x = 36,925,002,834.57/192,786.90
  6. Step 6: Final answer
    x = 191,532.74

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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.