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Finding the Fourth Proportional to 71,672.80, 98,762.76 and 55,441.54

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Solution

The fourth proportional to 71,672.80, 98,762.76 and 55,441.54 is: 76,396.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.80 : 98,762.76 = 55,441.54 : x
  2. Step 2: Convert to fraction form
    71,672.80/98,762.76 = 55,441.54/x
  3. Step 3: Cross multiply
    71,672.80x = 98,762.76 × 55,441.54
  4. Step 4: Simplify right side
    71,672.80x = 5,475,559,509.05
  5. Step 5: Solve for x
    x = 5,475,559,509.05/71,672.80
  6. Step 6: Final answer
    x = 76,396.62

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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.