Home / 129,103.88-178,197.19-72,533.48

Finding the Fourth Proportional to 129,103.88, 178,197.19 and 72,533.48

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Solution

The fourth proportional to 129,103.88, 178,197.19 and 72,533.48 is: 100,115.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,103.88 : 178,197.19 = 72,533.48 : x
  2. Step 2: Convert to fraction form
    129,103.88/178,197.19 = 72,533.48/x
  3. Step 3: Cross multiply
    129,103.88x = 178,197.19 × 72,533.48
  4. Step 4: Simplify right side
    129,103.88x = 12,925,262,135.59
  5. Step 5: Solve for x
    x = 12,925,262,135.59/129,103.88
  6. Step 6: Final answer
    x = 100,115.21

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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.