Home / 78,812.82-108,761.70-50,518.58

Finding the Fourth Proportional to 78,812.82, 108,761.70 and 50,518.58

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Solution

The fourth proportional to 78,812.82, 108,761.70 and 50,518.58 is: 69,715.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,812.82 : 108,761.70 = 50,518.58 : x
  2. Step 2: Convert to fraction form
    78,812.82/108,761.70 = 50,518.58/x
  3. Step 3: Cross multiply
    78,812.82x = 108,761.70 × 50,518.58
  4. Step 4: Simplify right side
    78,812.82x = 5,494,486,098.58
  5. Step 5: Solve for x
    x = 5,494,486,098.58/78,812.82
  6. Step 6: Final answer
    x = 69,715.64

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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.