Home / 81,286.94-111,926.70-71,158.70

Finding the Fourth Proportional to 81,286.94, 111,926.70 and 71,158.70

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Solution

The fourth proportional to 81,286.94, 111,926.70 and 71,158.70 is: 97,980.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,286.94 : 111,926.70 = 71,158.70 : x
  2. Step 2: Convert to fraction form
    81,286.94/111,926.70 = 71,158.70/x
  3. Step 3: Cross multiply
    81,286.94x = 111,926.70 × 71,158.70
  4. Step 4: Simplify right side
    81,286.94x = 7,964,558,467.29
  5. Step 5: Solve for x
    x = 7,964,558,467.29/81,286.94
  6. Step 6: Final answer
    x = 97,980.79

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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.