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Finding the Fourth Proportional to 60,231.21, 90,361.17 and 20,788.67

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Solution

The fourth proportional to 60,231.21, 90,361.17 and 20,788.67 is: 31,187.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,231.21 : 90,361.17 = 20,788.67 : x
  2. Step 2: Convert to fraction form
    60,231.21/90,361.17 = 20,788.67/x
  3. Step 3: Cross multiply
    60,231.21x = 90,361.17 × 20,788.67
  4. Step 4: Simplify right side
    60,231.21x = 1,878,488,092.14
  5. Step 5: Solve for x
    x = 1,878,488,092.14/60,231.21
  6. Step 6: Final answer
    x = 31,187.95

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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.