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Finding the Fourth Proportional to 71,628.94, 107,145.06 and 66,314.53

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Solution

The fourth proportional to 71,628.94, 107,145.06 and 66,314.53 is: 99,195.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.94 : 107,145.06 = 66,314.53 : x
  2. Step 2: Convert to fraction form
    71,628.94/107,145.06 = 66,314.53/x
  3. Step 3: Cross multiply
    71,628.94x = 107,145.06 × 66,314.53
  4. Step 4: Simplify right side
    71,628.94x = 7,105,274,295.72
  5. Step 5: Solve for x
    x = 7,105,274,295.72/71,628.94
  6. Step 6: Final answer
    x = 99,195.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.