Home / 129,365.35-178,523.92-72,776.73

Finding the Fourth Proportional to 129,365.35, 178,523.92 and 72,776.73

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Solution

The fourth proportional to 129,365.35, 178,523.92 and 72,776.73 is: 100,431.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,365.35 : 178,523.92 = 72,776.73 : x
  2. Step 2: Convert to fraction form
    129,365.35/178,523.92 = 72,776.73/x
  3. Step 3: Cross multiply
    129,365.35x = 178,523.92 × 72,776.73
  4. Step 4: Simplify right side
    129,365.35x = 12,992,386,471.25
  5. Step 5: Solve for x
    x = 12,992,386,471.25/129,365.35
  6. Step 6: Final answer
    x = 100,431.73

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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.