Home / 139,344-192,302.02-81,986.28

Finding the Fourth Proportional to 139,344, 192,302.02 and 81,986.28

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Solution

The fourth proportional to 139,344, 192,302.02 and 81,986.28 is: 113,145.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,344 : 192,302.02 = 81,986.28 : x
  2. Step 2: Convert to fraction form
    139,344/192,302.02 = 81,986.28/x
  3. Step 3: Cross multiply
    139,344x = 192,302.02 × 81,986.28
  4. Step 4: Simplify right side
    139,344x = 15,766,127,256.29
  5. Step 5: Solve for x
    x = 15,766,127,256.29/139,344
  6. Step 6: Final answer
    x = 113,145.36

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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.