Home / 228,923.88-315,913.96-128,321.88

Finding the Fourth Proportional to 228,923.88, 315,913.96 and 128,321.88

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Solution

The fourth proportional to 228,923.88, 315,913.96 and 128,321.88 is: 177,083.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,923.88 : 315,913.96 = 128,321.88 : x
  2. Step 2: Convert to fraction form
    228,923.88/315,913.96 = 128,321.88/x
  3. Step 3: Cross multiply
    228,923.88x = 315,913.96 × 128,321.88
  4. Step 4: Simplify right side
    228,923.88x = 40,538,673,265.44
  5. Step 5: Solve for x
    x = 40,538,673,265.44/228,923.88
  6. Step 6: Final answer
    x = 177,083.64

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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.