Home / 129,131.88-178,206.58-71,772.36

Finding the Fourth Proportional to 129,131.88, 178,206.58 and 71,772.36

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Solution

The fourth proportional to 129,131.88, 178,206.58 and 71,772.36 is: 99,048.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,131.88 : 178,206.58 = 71,772.36 : x
  2. Step 2: Convert to fraction form
    129,131.88/178,206.58 = 71,772.36/x
  3. Step 3: Cross multiply
    129,131.88x = 178,206.58 × 71,772.36
  4. Step 4: Simplify right side
    129,131.88x = 12,790,306,814.13
  5. Step 5: Solve for x
    x = 12,790,306,814.13/129,131.88
  6. Step 6: Final answer
    x = 99,048.41

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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.