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Finding the Fourth Proportional to 71,471.70, 98,623.94 and 39,639.96

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Solution

The fourth proportional to 71,471.70, 98,623.94 and 39,639.96 is: 54,699.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,471.70 : 98,623.94 = 39,639.96 : x
  2. Step 2: Convert to fraction form
    71,471.70/98,623.94 = 39,639.96/x
  3. Step 3: Cross multiply
    71,471.70x = 98,623.94 × 39,639.96
  4. Step 4: Simplify right side
    71,471.70x = 3,909,448,838.44
  5. Step 5: Solve for x
    x = 3,909,448,838.44/71,471.70
  6. Step 6: Final answer
    x = 54,699.26

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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.