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Finding the Fourth Proportional to 136,344.31, 188,162.90 and 81,913.13

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Solution

The fourth proportional to 136,344.31, 188,162.90 and 81,913.13 is: 113,044.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,344.31 : 188,162.90 = 81,913.13 : x
  2. Step 2: Convert to fraction form
    136,344.31/188,162.90 = 81,913.13/x
  3. Step 3: Cross multiply
    136,344.31x = 188,162.90 × 81,913.13
  4. Step 4: Simplify right side
    136,344.31x = 15,413,012,088.88
  5. Step 5: Solve for x
    x = 15,413,012,088.88/136,344.31
  6. Step 6: Final answer
    x = 113,044.78

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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.