Home / 139,708.31-192,768.28-91,381.07

Finding the Fourth Proportional to 139,708.31, 192,768.28 and 91,381.07

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Solution

The fourth proportional to 139,708.31, 192,768.28 and 91,381.07 is: 126,086.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,708.31 : 192,768.28 = 91,381.07 : x
  2. Step 2: Convert to fraction form
    139,708.31/192,768.28 = 91,381.07/x
  3. Step 3: Cross multiply
    139,708.31x = 192,768.28 × 91,381.07
  4. Step 4: Simplify right side
    139,708.31x = 17,615,371,941.93
  5. Step 5: Solve for x
    x = 17,615,371,941.93/139,708.31
  6. Step 6: Final answer
    x = 126,086.79

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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.