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Finding the Fourth Proportional to 74,863.85, 112,394.20 and 68,674.64

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Solution

The fourth proportional to 74,863.85, 112,394.20 and 68,674.64 is: 103,102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,863.85 : 112,394.20 = 68,674.64 : x
  2. Step 2: Convert to fraction form
    74,863.85/112,394.20 = 68,674.64/x
  3. Step 3: Cross multiply
    74,863.85x = 112,394.20 × 68,674.64
  4. Step 4: Simplify right side
    74,863.85x = 7,718,631,332.39
  5. Step 5: Solve for x
    x = 7,718,631,332.39/74,863.85
  6. Step 6: Final answer
    x = 103,102.25

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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.