Home / 129,019.10-178,015.20-75,273.44

Finding the Fourth Proportional to 129,019.10, 178,015.20 and 75,273.44

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Solution

The fourth proportional to 129,019.10, 178,015.20 and 75,273.44 is: 103,859.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,019.10 : 178,015.20 = 75,273.44 : x
  2. Step 2: Convert to fraction form
    129,019.10/178,015.20 = 75,273.44/x
  3. Step 3: Cross multiply
    129,019.10x = 178,015.20 × 75,273.44
  4. Step 4: Simplify right side
    129,019.10x = 13,399,816,476.29
  5. Step 5: Solve for x
    x = 13,399,816,476.29/129,019.10
  6. Step 6: Final answer
    x = 103,859.17

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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.