Home / 228,949.44-315,948.96-128,345.28

Finding the Fourth Proportional to 228,949.44, 315,948.96 and 128,345.28

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Solution

The fourth proportional to 228,949.44, 315,948.96 and 128,345.28 is: 177,115.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,949.44 : 315,948.96 = 128,345.28 : x
  2. Step 2: Convert to fraction form
    228,949.44/315,948.96 = 128,345.28/x
  3. Step 3: Cross multiply
    228,949.44x = 315,948.96 × 128,345.28
  4. Step 4: Simplify right side
    228,949.44x = 40,550,557,736.91
  5. Step 5: Solve for x
    x = 40,550,557,736.91/228,949.44
  6. Step 6: Final answer
    x = 177,115.78

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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.