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Finding the Fourth Proportional to 128,601.62, 192,902.45 and 53,680.90

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Solution

The fourth proportional to 128,601.62, 192,902.45 and 53,680.90 is: 80,521.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,601.62 : 192,902.45 = 53,680.90 : x
  2. Step 2: Convert to fraction form
    128,601.62/192,902.45 = 53,680.90/x
  3. Step 3: Cross multiply
    128,601.62x = 192,902.45 × 53,680.90
  4. Step 4: Simplify right side
    128,601.62x = 10,355,176,297.90
  5. Step 5: Solve for x
    x = 10,355,176,297.90/128,601.62
  6. Step 6: Final answer
    x = 80,521.35

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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.