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Finding the Fourth Proportional to 128,402.88, 192,612.96 and 34,906.56

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Solution

The fourth proportional to 128,402.88, 192,612.96 and 34,906.56 is: 52,362.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,402.88 : 192,612.96 = 34,906.56 : x
  2. Step 2: Convert to fraction form
    128,402.88/192,612.96 = 34,906.56/x
  3. Step 3: Cross multiply
    128,402.88x = 192,612.96 × 34,906.56
  4. Step 4: Simplify right side
    128,402.88x = 6,723,455,845.02
  5. Step 5: Solve for x
    x = 6,723,455,845.02/128,402.88
  6. Step 6: Final answer
    x = 52,362.19

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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.