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Finding the Fourth Proportional to 103,679.72, 155,514.12 and 51,071.44

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Solution

The fourth proportional to 103,679.72, 155,514.12 and 51,071.44 is: 76,604.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,679.72 : 155,514.12 = 51,071.44 : x
  2. Step 2: Convert to fraction form
    103,679.72/155,514.12 = 51,071.44/x
  3. Step 3: Cross multiply
    103,679.72x = 155,514.12 × 51,071.44
  4. Step 4: Simplify right side
    103,679.72x = 7,942,330,048.73
  5. Step 5: Solve for x
    x = 7,942,330,048.73/103,679.72
  6. Step 6: Final answer
    x = 76,604.47

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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.