Home / 129,105.07-178,161.12-71,744.20

Finding the Fourth Proportional to 129,105.07, 178,161.12 and 71,744.20

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Solution

The fourth proportional to 129,105.07, 178,161.12 and 71,744.20 is: 99,004.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,105.07 : 178,161.12 = 71,744.20 : x
  2. Step 2: Convert to fraction form
    129,105.07/178,161.12 = 71,744.20/x
  3. Step 3: Cross multiply
    129,105.07x = 178,161.12 × 71,744.20
  4. Step 4: Simplify right side
    129,105.07x = 12,782,027,025.50
  5. Step 5: Solve for x
    x = 12,782,027,025.50/129,105.07
  6. Step 6: Final answer
    x = 99,004.84

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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.