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Finding the Fourth Proportional to 71,704.32, 98,954.36 and 39,440.28

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Solution

The fourth proportional to 71,704.32, 98,954.36 and 39,440.28 is: 54,428.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,704.32 : 98,954.36 = 39,440.28 : x
  2. Step 2: Convert to fraction form
    71,704.32/98,954.36 = 39,440.28/x
  3. Step 3: Cross multiply
    71,704.32x = 98,954.36 × 39,440.28
  4. Step 4: Simplify right side
    71,704.32x = 3,902,786,973.65
  5. Step 5: Solve for x
    x = 3,902,786,973.65/71,704.32
  6. Step 6: Final answer
    x = 54,428.90

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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.