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Finding the Fourth Proportional to 71,803.92, 107,704.34 and 19,213.40

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Solution

The fourth proportional to 71,803.92, 107,704.34 and 19,213.40 is: 28,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,803.92 : 107,704.34 = 19,213.40 : x
  2. Step 2: Convert to fraction form
    71,803.92/107,704.34 = 19,213.40/x
  3. Step 3: Cross multiply
    71,803.92x = 107,704.34 × 19,213.40
  4. Step 4: Simplify right side
    71,803.92x = 2,069,366,566.16
  5. Step 5: Solve for x
    x = 2,069,366,566.16/71,803.92
  6. Step 6: Final answer
    x = 28,819.69

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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.