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Finding the Fourth Proportional to 71,675.76, 98,912.29 and 39,412.49

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Solution

The fourth proportional to 71,675.76, 98,912.29 and 39,412.49 is: 54,389.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,675.76 : 98,912.29 = 39,412.49 : x
  2. Step 2: Convert to fraction form
    71,675.76/98,912.29 = 39,412.49/x
  3. Step 3: Cross multiply
    71,675.76x = 98,912.29 × 39,412.49
  4. Step 4: Simplify right side
    71,675.76x = 3,898,379,640.50
  5. Step 5: Solve for x
    x = 3,898,379,640.50/71,675.76
  6. Step 6: Final answer
    x = 54,389.09

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1.5x scale

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.