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Finding the Fourth Proportional to 71,491.23, 98,669.70 and 39,670.38

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Solution

The fourth proportional to 71,491.23, 98,669.70 and 39,670.38 is: 54,751.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,491.23 : 98,669.70 = 39,670.38 : x
  2. Step 2: Convert to fraction form
    71,491.23/98,669.70 = 39,670.38/x
  3. Step 3: Cross multiply
    71,491.23x = 98,669.70 × 39,670.38
  4. Step 4: Simplify right side
    71,491.23x = 3,914,264,493.49
  5. Step 5: Solve for x
    x = 3,914,264,493.49/71,491.23
  6. Step 6: Final answer
    x = 54,751.67

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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.