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Finding the Fourth Proportional to 71,927.96, 99,256.86 and 39,667.88

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Solution

The fourth proportional to 71,927.96, 99,256.86 and 39,667.88 is: 54,739.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,927.96 : 99,256.86 = 39,667.88 : x
  2. Step 2: Convert to fraction form
    71,927.96/99,256.86 = 39,667.88/x
  3. Step 3: Cross multiply
    71,927.96x = 99,256.86 × 39,667.88
  4. Step 4: Simplify right side
    71,927.96x = 3,937,309,211.66
  5. Step 5: Solve for x
    x = 3,937,309,211.66/71,927.96
  6. Step 6: Final answer
    x = 54,739.62

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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.