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Finding the Fourth Proportional to 71,004.70, 97,986.80 and 39,174.53

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Solution

The fourth proportional to 71,004.70, 97,986.80 and 39,174.53 is: 54,061.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,004.70 : 97,986.80 = 39,174.53 : x
  2. Step 2: Convert to fraction form
    71,004.70/97,986.80 = 39,174.53/x
  3. Step 3: Cross multiply
    71,004.70x = 97,986.80 × 39,174.53
  4. Step 4: Simplify right side
    71,004.70x = 3,838,586,640.33
  5. Step 5: Solve for x
    x = 3,838,586,640.33/71,004.70
  6. Step 6: Final answer
    x = 54,061.03

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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.