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Finding the Fourth Proportional to 71,240.40, 98,313.30 and 39,411.54

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Solution

The fourth proportional to 71,240.40, 98,313.30 and 39,411.54 is: 54,388.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,240.40 : 98,313.30 = 39,411.54 : x
  2. Step 2: Convert to fraction form
    71,240.40/98,313.30 = 39,411.54/x
  3. Step 3: Cross multiply
    71,240.40x = 98,313.30 × 39,411.54
  4. Step 4: Simplify right side
    71,240.40x = 3,874,678,555.48
  5. Step 5: Solve for x
    x = 3,874,678,555.48/71,240.40
  6. Step 6: Final answer
    x = 54,388.78

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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.