Home / 71,743.12-107,598.24-21,129.05

Finding the Fourth Proportional to 71,743.12, 107,598.24 and 21,129.05

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Solution

The fourth proportional to 71,743.12, 107,598.24 and 21,129.05 is: 31,688.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,743.12 : 107,598.24 = 21,129.05 : x
  2. Step 2: Convert to fraction form
    71,743.12/107,598.24 = 21,129.05/x
  3. Step 3: Cross multiply
    71,743.12x = 107,598.24 × 21,129.05
  4. Step 4: Simplify right side
    71,743.12x = 2,273,448,861.87
  5. Step 5: Solve for x
    x = 2,273,448,861.87/71,743.12
  6. Step 6: Final answer
    x = 31,688.74

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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.