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Finding the Fourth Proportional to 128,165.75, 175,584.15 and 123,373.92

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Solution

The fourth proportional to 128,165.75, 175,584.15 and 123,373.92 is: 169,019.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,165.75 : 175,584.15 = 123,373.92 : x
  2. Step 2: Convert to fraction form
    128,165.75/175,584.15 = 123,373.92/x
  3. Step 3: Cross multiply
    128,165.75x = 175,584.15 × 123,373.92
  4. Step 4: Simplify right side
    128,165.75x = 21,662,504,875.37
  5. Step 5: Solve for x
    x = 21,662,504,875.37/128,165.75
  6. Step 6: Final answer
    x = 169,019.46

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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.