Home / 129,620.82-178,899.93-75,902.70

Finding the Fourth Proportional to 129,620.82, 178,899.93 and 75,902.70

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Solution

The fourth proportional to 129,620.82, 178,899.93 and 75,902.70 is: 104,759.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,620.82 : 178,899.93 = 75,902.70 : x
  2. Step 2: Convert to fraction form
    129,620.82/178,899.93 = 75,902.70/x
  3. Step 3: Cross multiply
    129,620.82x = 178,899.93 × 75,902.70
  4. Step 4: Simplify right side
    129,620.82x = 13,578,987,716.81
  5. Step 5: Solve for x
    x = 13,578,987,716.81/129,620.82
  6. Step 6: Final answer
    x = 104,759.31

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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.