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Finding the Fourth Proportional to 71,379.53, 107,082.80 and 28,688.27

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Solution

The fourth proportional to 71,379.53, 107,082.80 and 28,688.27 is: 43,037.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.53 : 107,082.80 = 28,688.27 : x
  2. Step 2: Convert to fraction form
    71,379.53/107,082.80 = 28,688.27/x
  3. Step 3: Cross multiply
    71,379.53x = 107,082.80 × 28,688.27
  4. Step 4: Simplify right side
    71,379.53x = 3,072,020,618.18
  5. Step 5: Solve for x
    x = 3,072,020,618.18/71,379.53
  6. Step 6: Final answer
    x = 43,037.84

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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.