Home / 129,107.24-178,161.54-78,131.24

Finding the Fourth Proportional to 129,107.24, 178,161.54 and 78,131.24

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Solution

The fourth proportional to 129,107.24, 178,161.54 and 78,131.24 is: 107,817.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,107.24 : 178,161.54 = 78,131.24 : x
  2. Step 2: Convert to fraction form
    129,107.24/178,161.54 = 78,131.24/x
  3. Step 3: Cross multiply
    129,107.24x = 178,161.54 × 78,131.24
  4. Step 4: Simplify right side
    129,107.24x = 13,919,982,040.51
  5. Step 5: Solve for x
    x = 13,919,982,040.51/129,107.24
  6. Step 6: Final answer
    x = 107,817.21

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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.