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Finding the Fourth Proportional to 72,629.80, 108,798.90 and 41,428.60

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Solution

The fourth proportional to 72,629.80, 108,798.90 and 41,428.60 is: 62,059.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,629.80 : 108,798.90 = 41,428.60 : x
  2. Step 2: Convert to fraction form
    72,629.80/108,798.90 = 41,428.60/x
  3. Step 3: Cross multiply
    72,629.80x = 108,798.90 × 41,428.60
  4. Step 4: Simplify right side
    72,629.80x = 4,507,386,108.54
  5. Step 5: Solve for x
    x = 4,507,386,108.54/72,629.80
  6. Step 6: Final answer
    x = 62,059.73

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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.