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Finding the Fourth Proportional to 124,620.40, 186,809.10 and 71,257.60

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Solution

The fourth proportional to 124,620.40, 186,809.10 and 71,257.60 is: 106,816.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,620.40 : 186,809.10 = 71,257.60 : x
  2. Step 2: Convert to fraction form
    124,620.40/186,809.10 = 71,257.60/x
  3. Step 3: Cross multiply
    124,620.40x = 186,809.10 × 71,257.60
  4. Step 4: Simplify right side
    124,620.40x = 13,311,568,124.16
  5. Step 5: Solve for x
    x = 13,311,568,124.16/124,620.40
  6. Step 6: Final answer
    x = 106,816.93

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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.