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Finding the Fourth Proportional to 71,247.60, 106,871.40 and 18,662.40

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Solution

The fourth proportional to 71,247.60, 106,871.40 and 18,662.40 is: 27,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,247.60 : 106,871.40 = 18,662.40 : x
  2. Step 2: Convert to fraction form
    71,247.60/106,871.40 = 18,662.40/x
  3. Step 3: Cross multiply
    71,247.60x = 106,871.40 × 18,662.40
  4. Step 4: Simplify right side
    71,247.60x = 1,994,476,815.36
  5. Step 5: Solve for x
    x = 1,994,476,815.36/71,247.60
  6. Step 6: Final answer
    x = 27,993.60

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1.5x scale

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.