Home / 129,091.74-178,197.39-81,336.21

Finding the Fourth Proportional to 129,091.74, 178,197.39 and 81,336.21

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Solution

The fourth proportional to 129,091.74, 178,197.39 and 81,336.21 is: 112,275.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,091.74 : 178,197.39 = 81,336.21 : x
  2. Step 2: Convert to fraction form
    129,091.74/178,197.39 = 81,336.21/x
  3. Step 3: Cross multiply
    129,091.74x = 178,197.39 × 81,336.21
  4. Step 4: Simplify right side
    129,091.74x = 14,493,900,334.49
  5. Step 5: Solve for x
    x = 14,493,900,334.49/129,091.74
  6. Step 6: Final answer
    x = 112,275.97

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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.