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Finding the Fourth Proportional to 71,736.60, 107,608.92 and 21,818.30

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Solution

The fourth proportional to 71,736.60, 107,608.92 and 21,818.30 is: 32,728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,736.60 : 107,608.92 = 21,818.30 : x
  2. Step 2: Convert to fraction form
    71,736.60/107,608.92 = 21,818.30/x
  3. Step 3: Cross multiply
    71,736.60x = 107,608.92 × 21,818.30
  4. Step 4: Simplify right side
    71,736.60x = 2,347,843,699.24
  5. Step 5: Solve for x
    x = 2,347,843,699.24/71,736.60
  6. Step 6: Final answer
    x = 32,728.67

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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.