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Finding the Fourth Proportional to 128,195.52, 192,311.51 and 39,456.42

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Solution

The fourth proportional to 128,195.52, 192,311.51 and 39,456.42 is: 59,190.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,195.52 : 192,311.51 = 39,456.42 : x
  2. Step 2: Convert to fraction form
    128,195.52/192,311.51 = 39,456.42/x
  3. Step 3: Cross multiply
    128,195.52x = 192,311.51 × 39,456.42
  4. Step 4: Simplify right side
    128,195.52x = 7,587,924,455.22
  5. Step 5: Solve for x
    x = 7,587,924,455.22/128,195.52
  6. Step 6: Final answer
    x = 59,190.24

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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.