Home / 138,898.11-191,669.46-81,539.79

Finding the Fourth Proportional to 138,898.11, 191,669.46 and 81,539.79

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Solution

The fourth proportional to 138,898.11, 191,669.46 and 81,539.79 is: 112,519.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,898.11 : 191,669.46 = 81,539.79 : x
  2. Step 2: Convert to fraction form
    138,898.11/191,669.46 = 81,539.79/x
  3. Step 3: Cross multiply
    138,898.11x = 191,669.46 × 81,539.79
  4. Step 4: Simplify right side
    138,898.11x = 15,628,687,517.81
  5. Step 5: Solve for x
    x = 15,628,687,517.81/138,898.11
  6. Step 6: Final answer
    x = 112,519.08

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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.