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Finding the Fourth Proportional to 88,978.20, 133,540.20 and 86,062.20

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Solution

The fourth proportional to 88,978.20, 133,540.20 and 86,062.20 is: 129,163.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,978.20 : 133,540.20 = 86,062.20 : x
  2. Step 2: Convert to fraction form
    88,978.20/133,540.20 = 86,062.20/x
  3. Step 3: Cross multiply
    88,978.20x = 133,540.20 × 86,062.20
  4. Step 4: Simplify right side
    88,978.20x = 11,492,763,400.44
  5. Step 5: Solve for x
    x = 11,492,763,400.44/88,978.20
  6. Step 6: Final answer
    x = 129,163.81

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