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Finding the Fourth Proportional to 128,183.58, 192,275.82 and 39,436.48

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Solution

The fourth proportional to 128,183.58, 192,275.82 and 39,436.48 is: 59,154.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,183.58 : 192,275.82 = 39,436.48 : x
  2. Step 2: Convert to fraction form
    128,183.58/192,275.82 = 39,436.48/x
  3. Step 3: Cross multiply
    128,183.58x = 192,275.82 × 39,436.48
  4. Step 4: Simplify right side
    128,183.58x = 7,582,681,529.91
  5. Step 5: Solve for x
    x = 7,582,681,529.91/128,183.58
  6. Step 6: Final answer
    x = 59,154.86

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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.