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Finding the Fourth Proportional to 102,991.20, 154,389.60 and 92,493.60

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Solution

The fourth proportional to 102,991.20, 154,389.60 and 92,493.60 is: 138,653.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,991.20 : 154,389.60 = 92,493.60 : x
  2. Step 2: Convert to fraction form
    102,991.20/154,389.60 = 92,493.60/x
  3. Step 3: Cross multiply
    102,991.20x = 154,389.60 × 92,493.60
  4. Step 4: Simplify right side
    102,991.20x = 14,280,049,906.56
  5. Step 5: Solve for x
    x = 14,280,049,906.56/102,991.20
  6. Step 6: Final answer
    x = 138,653.11

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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.