Home / 129,149.04-178,227.36-78,161.16

Finding the Fourth Proportional to 129,149.04, 178,227.36 and 78,161.16

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Solution

The fourth proportional to 129,149.04, 178,227.36 and 78,161.16 is: 107,863.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,149.04 : 178,227.36 = 78,161.16 : x
  2. Step 2: Convert to fraction form
    129,149.04/178,227.36 = 78,161.16/x
  3. Step 3: Cross multiply
    129,149.04x = 178,227.36 × 78,161.16
  4. Step 4: Simplify right side
    129,149.04x = 13,930,457,201.34
  5. Step 5: Solve for x
    x = 13,930,457,201.34/129,149.04
  6. Step 6: Final answer
    x = 107,863.42

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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.