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Finding the Fourth Proportional to 72,627.68, 108,899.60 and 28,202.54

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Solution

The fourth proportional to 72,627.68, 108,899.60 and 28,202.54 is: 42,287.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,627.68 : 108,899.60 = 28,202.54 : x
  2. Step 2: Convert to fraction form
    72,627.68/108,899.60 = 28,202.54/x
  3. Step 3: Cross multiply
    72,627.68x = 108,899.60 × 28,202.54
  4. Step 4: Simplify right side
    72,627.68x = 3,071,244,639.47
  5. Step 5: Solve for x
    x = 3,071,244,639.47/72,627.68
  6. Step 6: Final answer
    x = 42,287.53

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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.