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Finding the Fourth Proportional to 124,620.90, 186,708.60 and 75,845.40

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Solution

The fourth proportional to 124,620.90, 186,708.60 and 75,845.40 is: 113,632.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,620.90 : 186,708.60 = 75,845.40 : x
  2. Step 2: Convert to fraction form
    124,620.90/186,708.60 = 75,845.40/x
  3. Step 3: Cross multiply
    124,620.90x = 186,708.60 × 75,845.40
  4. Step 4: Simplify right side
    124,620.90x = 14,160,988,450.44
  5. Step 5: Solve for x
    x = 14,160,988,450.44/124,620.90
  6. Step 6: Final answer
    x = 113,632.53

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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.