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Finding the Fourth Proportional to 159,668.72, 239,651.40 and 80,838.80

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Solution

The fourth proportional to 159,668.72, 239,651.40 and 80,838.80 is: 121,333.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,668.72 : 239,651.40 = 80,838.80 : x
  2. Step 2: Convert to fraction form
    159,668.72/239,651.40 = 80,838.80/x
  3. Step 3: Cross multiply
    159,668.72x = 239,651.40 × 80,838.80
  4. Step 4: Simplify right side
    159,668.72x = 19,373,131,594.32
  5. Step 5: Solve for x
    x = 19,373,131,594.32/159,668.72
  6. Step 6: Final answer
    x = 121,333.29

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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.