Home / 123,905.20-170,989.36-67,316.56

Finding the Fourth Proportional to 123,905.20, 170,989.36 and 67,316.56

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Solution

The fourth proportional to 123,905.20, 170,989.36 and 67,316.56 is: 92,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,905.20 : 170,989.36 = 67,316.56 : x
  2. Step 2: Convert to fraction form
    123,905.20/170,989.36 = 67,316.56/x
  3. Step 3: Cross multiply
    123,905.20x = 170,989.36 × 67,316.56
  4. Step 4: Simplify right side
    123,905.20x = 11,510,415,511.80
  5. Step 5: Solve for x
    x = 11,510,415,511.80/123,905.20
  6. Step 6: Final answer
    x = 92,896.95

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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.