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Finding the Fourth Proportional to 102,991.50, 154,488.18 and 40,662

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Solution

The fourth proportional to 102,991.50, 154,488.18 and 40,662 is: 60,993.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,991.50 : 154,488.18 = 40,662 : x
  2. Step 2: Convert to fraction form
    102,991.50/154,488.18 = 40,662/x
  3. Step 3: Cross multiply
    102,991.50x = 154,488.18 × 40,662
  4. Step 4: Simplify right side
    102,991.50x = 6,281,798,375.16
  5. Step 5: Solve for x
    x = 6,281,798,375.16/102,991.50
  6. Step 6: Final answer
    x = 60,993.37

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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.