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Finding the Fourth Proportional to 89,990.56, 134,901.68 and 40,043.52

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Solution

The fourth proportional to 89,990.56, 134,901.68 and 40,043.52 is: 60,027.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,990.56 : 134,901.68 = 40,043.52 : x
  2. Step 2: Convert to fraction form
    89,990.56/134,901.68 = 40,043.52/x
  3. Step 3: Cross multiply
    89,990.56x = 134,901.68 × 40,043.52
  4. Step 4: Simplify right side
    89,990.56x = 5,401,938,121.11
  5. Step 5: Solve for x
    x = 5,401,938,121.11/89,990.56
  6. Step 6: Final answer
    x = 60,027.83

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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.