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Finding the Fourth Proportional to 228,843.72, 315,795.78 and 128,235.24

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Solution

The fourth proportional to 228,843.72, 315,795.78 and 128,235.24 is: 176,959.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,843.72 : 315,795.78 = 128,235.24 : x
  2. Step 2: Convert to fraction form
    228,843.72/315,795.78 = 128,235.24/x
  3. Step 3: Cross multiply
    228,843.72x = 315,795.78 × 128,235.24
  4. Step 4: Simplify right side
    228,843.72x = 40,496,147,639.29
  5. Step 5: Solve for x
    x = 40,496,147,639.29/228,843.72
  6. Step 6: Final answer
    x = 176,959.84

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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.