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Finding the Fourth Proportional to 128,371.54, 192,602.94 and 57,287.72

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Solution

The fourth proportional to 128,371.54, 192,602.94 and 57,287.72 is: 85,951.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.54 : 192,602.94 = 57,287.72 : x
  2. Step 2: Convert to fraction form
    128,371.54/192,602.94 = 57,287.72/x
  3. Step 3: Cross multiply
    128,371.54x = 192,602.94 × 57,287.72
  4. Step 4: Simplify right side
    128,371.54x = 11,033,783,297.90
  5. Step 5: Solve for x
    x = 11,033,783,297.90/128,371.54
  6. Step 6: Final answer
    x = 85,951.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.