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Finding the Fourth Proportional to 71,629.94, 107,146.56 and 66,315.53

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Solution

The fourth proportional to 71,629.94, 107,146.56 and 66,315.53 is: 99,197.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,629.94 : 107,146.56 = 66,315.53 : x
  2. Step 2: Convert to fraction form
    71,629.94/107,146.56 = 66,315.53/x
  3. Step 3: Cross multiply
    71,629.94x = 107,146.56 × 66,315.53
  4. Step 4: Simplify right side
    71,629.94x = 7,105,480,914.08
  5. Step 5: Solve for x
    x = 7,105,480,914.08/71,629.94
  6. Step 6: Final answer
    x = 99,197.08

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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.