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Finding the Fourth Proportional to 278,845.21, 418,246.11 and 89,325.28

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Solution

The fourth proportional to 278,845.21, 418,246.11 and 89,325.28 is: 133,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,845.21 : 418,246.11 = 89,325.28 : x
  2. Step 2: Convert to fraction form
    278,845.21/418,246.11 = 89,325.28/x
  3. Step 3: Cross multiply
    278,845.21x = 418,246.11 × 89,325.28
  4. Step 4: Simplify right side
    278,845.21x = 37,359,950,884.66
  5. Step 5: Solve for x
    x = 37,359,950,884.66/278,845.21
  6. Step 6: Final answer
    x = 133,980.97

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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.