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Finding the Fourth Proportional to 139,694.28, 192,782.20 and 76,036.20

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Solution

The fourth proportional to 139,694.28, 192,782.20 and 76,036.20 is: 104,932.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,694.28 : 192,782.20 = 76,036.20 : x
  2. Step 2: Convert to fraction form
    139,694.28/192,782.20 = 76,036.20/x
  3. Step 3: Cross multiply
    139,694.28x = 192,782.20 × 76,036.20
  4. Step 4: Simplify right side
    139,694.28x = 14,658,425,915.64
  5. Step 5: Solve for x
    x = 14,658,425,915.64/139,694.28
  6. Step 6: Final answer
    x = 104,932.18

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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.