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Finding the Fourth Proportional to 228,953.12, 315,955.12 and 128,351.12

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Solution

The fourth proportional to 228,953.12, 315,955.12 and 128,351.12 is: 177,124.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,953.12 : 315,955.12 = 128,351.12 : x
  2. Step 2: Convert to fraction form
    228,953.12/315,955.12 = 128,351.12/x
  3. Step 3: Cross multiply
    228,953.12x = 315,955.12 × 128,351.12
  4. Step 4: Simplify right side
    228,953.12x = 40,553,193,521.73
  5. Step 5: Solve for x
    x = 40,553,193,521.73/228,953.12
  6. Step 6: Final answer
    x = 177,124.44

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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.