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Finding the Fourth Proportional to 228,930.61, 315,924.24 and 128,328.61

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Solution

The fourth proportional to 228,930.61, 315,924.24 and 128,328.61 is: 177,093.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,930.61 : 315,924.24 = 128,328.61 : x
  2. Step 2: Convert to fraction form
    228,930.61/315,924.24 = 128,328.61/x
  3. Step 3: Cross multiply
    228,930.61x = 315,924.24 × 128,328.61
  4. Step 4: Simplify right side
    228,930.61x = 40,542,118,868.29
  5. Step 5: Solve for x
    x = 40,542,118,868.29/228,930.61
  6. Step 6: Final answer
    x = 177,093.48

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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.