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Finding the Fourth Proportional to 128,486.02, 192,768.46 and 57,468.41

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Solution

The fourth proportional to 128,486.02, 192,768.46 and 57,468.41 is: 86,220.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486.02 : 192,768.46 = 57,468.41 : x
  2. Step 2: Convert to fraction form
    128,486.02/192,768.46 = 57,468.41/x
  3. Step 3: Cross multiply
    128,486.02x = 192,768.46 × 57,468.41
  4. Step 4: Simplify right side
    128,486.02x = 11,078,096,556.10
  5. Step 5: Solve for x
    x = 11,078,096,556.10/128,486.02
  6. Step 6: Final answer
    x = 86,220.25

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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.