Home / 129,171.26-178,255.53-72,582.63

Finding the Fourth Proportional to 129,171.26, 178,255.53 and 72,582.63

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Solution

The fourth proportional to 129,171.26, 178,255.53 and 72,582.63 is: 100,163.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,171.26 : 178,255.53 = 72,582.63 : x
  2. Step 2: Convert to fraction form
    129,171.26/178,255.53 = 72,582.63/x
  3. Step 3: Cross multiply
    129,171.26x = 178,255.53 × 72,582.63
  4. Step 4: Simplify right side
    129,171.26x = 12,938,255,179.44
  5. Step 5: Solve for x
    x = 12,938,255,179.44/129,171.26
  6. Step 6: Final answer
    x = 100,163.58

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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.