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Finding the Fourth Proportional to 102,990.10, 154,157.10 and 73,465.60

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Solution

The fourth proportional to 102,990.10, 154,157.10 and 73,465.60 is: 109,964.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.10 : 154,157.10 = 73,465.60 : x
  2. Step 2: Convert to fraction form
    102,990.10/154,157.10 = 73,465.60/x
  3. Step 3: Cross multiply
    102,990.10x = 154,157.10 × 73,465.60
  4. Step 4: Simplify right side
    102,990.10x = 11,325,243,845.76
  5. Step 5: Solve for x
    x = 11,325,243,845.76/102,990.10
  6. Step 6: Final answer
    x = 109,964.39

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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.