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Finding the Fourth Proportional to 124,433.60, 186,520.80 and 68,187.20

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Solution

The fourth proportional to 124,433.60, 186,520.80 and 68,187.20 is: 102,209.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,433.60 : 186,520.80 = 68,187.20 : x
  2. Step 2: Convert to fraction form
    124,433.60/186,520.80 = 68,187.20/x
  3. Step 3: Cross multiply
    124,433.60x = 186,520.80 × 68,187.20
  4. Step 4: Simplify right side
    124,433.60x = 12,718,331,093.76
  5. Step 5: Solve for x
    x = 12,718,331,093.76/124,433.60
  6. Step 6: Final answer
    x = 102,209.78

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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.