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Finding the Fourth Proportional to 128,166.35, 192,254.81 and 43,984.35

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Solution

The fourth proportional to 128,166.35, 192,254.81 and 43,984.35 is: 65,978.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,166.35 : 192,254.81 = 43,984.35 : x
  2. Step 2: Convert to fraction form
    128,166.35/192,254.81 = 43,984.35/x
  3. Step 3: Cross multiply
    128,166.35x = 192,254.81 × 43,984.35
  4. Step 4: Simplify right side
    128,166.35x = 8,456,202,632.30
  5. Step 5: Solve for x
    x = 8,456,202,632.30/128,166.35
  6. Step 6: Final answer
    x = 65,978.34

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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.