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Finding the Fourth Proportional to 123,883.44, 170,992.91 and 72,912.52

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Solution

The fourth proportional to 123,883.44, 170,992.91 and 72,912.52 is: 100,639.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,883.44 : 170,992.91 = 72,912.52 : x
  2. Step 2: Convert to fraction form
    123,883.44/170,992.91 = 72,912.52/x
  3. Step 3: Cross multiply
    123,883.44x = 170,992.91 × 72,912.52
  4. Step 4: Simplify right side
    123,883.44x = 12,467,524,366.26
  5. Step 5: Solve for x
    x = 12,467,524,366.26/123,883.44
  6. Step 6: Final answer
    x = 100,639.16

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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.