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Finding the Fourth Proportional to 128,236.98, 192,390.90 and 53,392.30

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Solution

The fourth proportional to 128,236.98, 192,390.90 and 53,392.30 is: 80,103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,236.98 : 192,390.90 = 53,392.30 : x
  2. Step 2: Convert to fraction form
    128,236.98/192,390.90 = 53,392.30/x
  3. Step 3: Cross multiply
    128,236.98x = 192,390.90 × 53,392.30
  4. Step 4: Simplify right side
    128,236.98x = 10,272,192,650.07
  5. Step 5: Solve for x
    x = 10,272,192,650.07/128,236.98
  6. Step 6: Final answer
    x = 80,103.20

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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.