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Finding the Fourth Proportional to 123,640.79, 170,622.27 and 69,923.79

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Solution

The fourth proportional to 123,640.79, 170,622.27 and 69,923.79 is: 96,493.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,640.79 : 170,622.27 = 69,923.79 : x
  2. Step 2: Convert to fraction form
    123,640.79/170,622.27 = 69,923.79/x
  3. Step 3: Cross multiply
    123,640.79x = 170,622.27 × 69,923.79
  4. Step 4: Simplify right side
    123,640.79x = 11,930,555,776.80
  5. Step 5: Solve for x
    x = 11,930,555,776.80/123,640.79
  6. Step 6: Final answer
    x = 96,493.69

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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.