Home / 135,443.13-186,912.89-81,717.77

Finding the Fourth Proportional to 135,443.13, 186,912.89 and 81,717.77

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Solution

The fourth proportional to 135,443.13, 186,912.89 and 81,717.77 is: 112,771.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,443.13 : 186,912.89 = 81,717.77 : x
  2. Step 2: Convert to fraction form
    135,443.13/186,912.89 = 81,717.77/x
  3. Step 3: Cross multiply
    135,443.13x = 186,912.89 × 81,717.77
  4. Step 4: Simplify right side
    135,443.13x = 15,274,104,488.62
  5. Step 5: Solve for x
    x = 15,274,104,488.62/135,443.13
  6. Step 6: Final answer
    x = 112,771.35

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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.