Home / 199,854.72-275,668.92-128,121.12

Finding the Fourth Proportional to 199,854.72, 275,668.92 and 128,121.12

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Solution

The fourth proportional to 199,854.72, 275,668.92 and 128,121.12 is: 176,723.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,854.72 : 275,668.92 = 128,121.12 : x
  2. Step 2: Convert to fraction form
    199,854.72/275,668.92 = 128,121.12/x
  3. Step 3: Cross multiply
    199,854.72x = 275,668.92 × 128,121.12
  4. Step 4: Simplify right side
    199,854.72x = 35,319,010,779.59
  5. Step 5: Solve for x
    x = 35,319,010,779.59/199,854.72
  6. Step 6: Final answer
    x = 176,723.43

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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.