Home / 202,979.12-280,378.92-155,815.28

Finding the Fourth Proportional to 202,979.12, 280,378.92 and 155,815.28

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Solution

The fourth proportional to 202,979.12, 280,378.92 and 155,815.28 is: 215,230.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,979.12 : 280,378.92 = 155,815.28 : x
  2. Step 2: Convert to fraction form
    202,979.12/280,378.92 = 155,815.28/x
  3. Step 3: Cross multiply
    202,979.12x = 280,378.92 × 155,815.28
  4. Step 4: Simplify right side
    202,979.12x = 43,687,319,925.90
  5. Step 5: Solve for x
    x = 43,687,319,925.90/202,979.12
  6. Step 6: Final answer
    x = 215,230.61

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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.