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Finding the Fourth Proportional to 128,245.17, 192,388.43 and 39,498.65

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Solution

The fourth proportional to 128,245.17, 192,388.43 and 39,498.65 is: 59,254.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,245.17 : 192,388.43 = 39,498.65 : x
  2. Step 2: Convert to fraction form
    128,245.17/192,388.43 = 39,498.65/x
  3. Step 3: Cross multiply
    128,245.17x = 192,388.43 × 39,498.65
  4. Step 4: Simplify right side
    128,245.17x = 7,599,083,260.62
  5. Step 5: Solve for x
    x = 7,599,083,260.62/128,245.17
  6. Step 6: Final answer
    x = 59,254.34

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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.