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Finding the Fourth Proportional to 128,161.68, 175,578.58 and 123,369.85

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Solution

The fourth proportional to 128,161.68, 175,578.58 and 123,369.85 is: 169,013.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,161.68 : 175,578.58 = 123,369.85 : x
  2. Step 2: Convert to fraction form
    128,161.68/175,578.58 = 123,369.85/x
  3. Step 3: Cross multiply
    128,161.68x = 175,578.58 × 123,369.85
  4. Step 4: Simplify right side
    128,161.68x = 21,661,103,077.81
  5. Step 5: Solve for x
    x = 21,661,103,077.81/128,161.68
  6. Step 6: Final answer
    x = 169,013.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.