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Finding the Fourth Proportional to 71,873.76, 99,188.84 and 40,042.64

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Solution

The fourth proportional to 71,873.76, 99,188.84 and 40,042.64 is: 55,260.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,873.76 : 99,188.84 = 40,042.64 : x
  2. Step 2: Convert to fraction form
    71,873.76/99,188.84 = 40,042.64/x
  3. Step 3: Cross multiply
    71,873.76x = 99,188.84 × 40,042.64
  4. Step 4: Simplify right side
    71,873.76x = 3,971,783,012.14
  5. Step 5: Solve for x
    x = 3,971,783,012.14/71,873.76
  6. Step 6: Final answer
    x = 55,260.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.