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Finding the Fourth Proportional to 128,165.28, 175,583.49 and 123,373.44

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Solution

The fourth proportional to 128,165.28, 175,583.49 and 123,373.44 is: 169,018.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,165.28 : 175,583.49 = 123,373.44 : x
  2. Step 2: Convert to fraction form
    128,165.28/175,583.49 = 123,373.44/x
  3. Step 3: Cross multiply
    128,165.28x = 175,583.49 × 123,373.44
  4. Step 4: Simplify right side
    128,165.28x = 21,662,339,168.51
  5. Step 5: Solve for x
    x = 21,662,339,168.51/128,165.28
  6. Step 6: Final answer
    x = 169,018.78

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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.