Home / 129,392.01-178,558.97-72,803.52

Finding the Fourth Proportional to 129,392.01, 178,558.97 and 72,803.52

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Solution

The fourth proportional to 129,392.01, 178,558.97 and 72,803.52 is: 100,467.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,392.01 : 178,558.97 = 72,803.52 : x
  2. Step 2: Convert to fraction form
    129,392.01/178,558.97 = 72,803.52/x
  3. Step 3: Cross multiply
    129,392.01x = 178,558.97 × 72,803.52
  4. Step 4: Simplify right side
    129,392.01x = 12,999,721,179.56
  5. Step 5: Solve for x
    x = 12,999,721,179.56/129,392.01
  6. Step 6: Final answer
    x = 100,467.73

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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.