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Finding the Fourth Proportional to 123,146.97, 169,939.42 and 69,431.51

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Solution

The fourth proportional to 123,146.97, 169,939.42 and 69,431.51 is: 95,813.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,146.97 : 169,939.42 = 69,431.51 : x
  2. Step 2: Convert to fraction form
    123,146.97/169,939.42 = 69,431.51/x
  3. Step 3: Cross multiply
    123,146.97x = 169,939.42 × 69,431.51
  4. Step 4: Simplify right side
    123,146.97x = 11,799,150,790.39
  5. Step 5: Solve for x
    x = 11,799,150,790.39/123,146.97
  6. Step 6: Final answer
    x = 95,813.57

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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.