Home / 128,977.06-177,979.66-71,613.43

Finding the Fourth Proportional to 128,977.06, 177,979.66 and 71,613.43

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Solution

The fourth proportional to 128,977.06, 177,979.66 and 71,613.43 is: 98,821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,977.06 : 177,979.66 = 71,613.43 : x
  2. Step 2: Convert to fraction form
    128,977.06/177,979.66 = 71,613.43/x
  3. Step 3: Cross multiply
    128,977.06x = 177,979.66 × 71,613.43
  4. Step 4: Simplify right side
    128,977.06x = 12,745,733,922.83
  5. Step 5: Solve for x
    x = 12,745,733,922.83/128,977.06
  6. Step 6: Final answer
    x = 98,821.71

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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.