Home / 129,173.80-178,249.75-71,809.63

Finding the Fourth Proportional to 129,173.80, 178,249.75 and 71,809.63

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Solution

The fourth proportional to 129,173.80, 178,249.75 and 71,809.63 is: 99,091.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,173.80 : 178,249.75 = 71,809.63 : x
  2. Step 2: Convert to fraction form
    129,173.80/178,249.75 = 71,809.63/x
  3. Step 3: Cross multiply
    129,173.80x = 178,249.75 × 71,809.63
  4. Step 4: Simplify right side
    129,173.80x = 12,800,048,231.71
  5. Step 5: Solve for x
    x = 12,800,048,231.71/129,173.80
  6. Step 6: Final answer
    x = 99,091.68

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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.