Home / 123,546.25-170,512.12-78,228.44

Finding the Fourth Proportional to 123,546.25, 170,512.12 and 78,228.44

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Solution

The fourth proportional to 123,546.25, 170,512.12 and 78,228.44 is: 107,966.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,546.25 : 170,512.12 = 78,228.44 : x
  2. Step 2: Convert to fraction form
    123,546.25/170,512.12 = 78,228.44/x
  3. Step 3: Cross multiply
    123,546.25x = 170,512.12 × 78,228.44
  4. Step 4: Simplify right side
    123,546.25x = 13,338,897,148.69
  5. Step 5: Solve for x
    x = 13,338,897,148.69/123,546.25
  6. Step 6: Final answer
    x = 107,966.83

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1.5x scale

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.