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Finding the Fourth Proportional to 100,551.87, 138,762.72 and 55,230.92

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Solution

The fourth proportional to 100,551.87, 138,762.72 and 55,230.92 is: 76,219.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,551.87 : 138,762.72 = 55,230.92 : x
  2. Step 2: Convert to fraction form
    100,551.87/138,762.72 = 55,230.92/x
  3. Step 3: Cross multiply
    100,551.87x = 138,762.72 × 55,230.92
  4. Step 4: Simplify right side
    100,551.87x = 7,663,991,993.49
  5. Step 5: Solve for x
    x = 7,663,991,993.49/100,551.87
  6. Step 6: Final answer
    x = 76,219.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.