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Finding the Fourth Proportional to 102,991.10, 154,158.60 and 73,466.60

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Solution

The fourth proportional to 102,991.10, 154,158.60 and 73,466.60 is: 109,965.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,991.10 : 154,158.60 = 73,466.60 : x
  2. Step 2: Convert to fraction form
    102,991.10/154,158.60 = 73,466.60/x
  3. Step 3: Cross multiply
    102,991.10x = 154,158.60 × 73,466.60
  4. Step 4: Simplify right side
    102,991.10x = 11,325,508,202.76
  5. Step 5: Solve for x
    x = 11,325,508,202.76/102,991.10
  6. Step 6: Final answer
    x = 109,965.89

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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.