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Finding the Fourth Proportional to 228,714.27, 315,625.71 and 128,112.27

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Solution

The fourth proportional to 228,714.27, 315,625.71 and 128,112.27 is: 176,794.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,714.27 : 315,625.71 = 128,112.27 : x
  2. Step 2: Convert to fraction form
    228,714.27/315,625.71 = 128,112.27/x
  3. Step 3: Cross multiply
    228,714.27x = 315,625.71 × 128,112.27
  4. Step 4: Simplify right side
    228,714.27x = 40,435,526,178.46
  5. Step 5: Solve for x
    x = 40,435,526,178.46/228,714.27
  6. Step 6: Final answer
    x = 176,794.94

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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.