Home / 81,742.38-112,816.71-49,929.66

Finding the Fourth Proportional to 81,742.38, 112,816.71 and 49,929.66

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Solution

The fourth proportional to 81,742.38, 112,816.71 and 49,929.66 is: 68,910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,742.38 : 112,816.71 = 49,929.66 : x
  2. Step 2: Convert to fraction form
    81,742.38/112,816.71 = 49,929.66/x
  3. Step 3: Cross multiply
    81,742.38x = 112,816.71 × 49,929.66
  4. Step 4: Simplify right side
    81,742.38x = 5,632,899,972.62
  5. Step 5: Solve for x
    x = 5,632,899,972.62/81,742.38
  6. Step 6: Final answer
    x = 68,910.40

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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.