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Finding the Fourth Proportional to 71,774.70, 99,047.76 and 39,943.32

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Solution

The fourth proportional to 71,774.70, 99,047.76 and 39,943.32 is: 55,121.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,774.70 : 99,047.76 = 39,943.32 : x
  2. Step 2: Convert to fraction form
    71,774.70/99,047.76 = 39,943.32/x
  3. Step 3: Cross multiply
    71,774.70x = 99,047.76 × 39,943.32
  4. Step 4: Simplify right side
    71,774.70x = 3,956,296,372.96
  5. Step 5: Solve for x
    x = 3,956,296,372.96/71,774.70
  6. Step 6: Final answer
    x = 55,121.04

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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.