Home / 129,365.88-178,524.18-72,777.72

Finding the Fourth Proportional to 129,365.88, 178,524.18 and 72,777.72

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Solution

The fourth proportional to 129,365.88, 178,524.18 and 72,777.72 is: 100,432.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,365.88 : 178,524.18 = 72,777.72 : x
  2. Step 2: Convert to fraction form
    129,365.88/178,524.18 = 72,777.72/x
  3. Step 3: Cross multiply
    129,365.88x = 178,524.18 × 72,777.72
  4. Step 4: Simplify right side
    129,365.88x = 12,992,582,785.27
  5. Step 5: Solve for x
    x = 12,992,582,785.27/129,365.88
  6. Step 6: Final answer
    x = 100,432.84

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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.