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Finding the Fourth Proportional to 71,272.40, 106,934.20 and 68,712.40

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Solution

The fourth proportional to 71,272.40, 106,934.20 and 68,712.40 is: 103,093.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,272.40 : 106,934.20 = 68,712.40 : x
  2. Step 2: Convert to fraction form
    71,272.40/106,934.20 = 68,712.40/x
  3. Step 3: Cross multiply
    71,272.40x = 106,934.20 × 68,712.40
  4. Step 4: Simplify right side
    71,272.40x = 7,347,705,524.08
  5. Step 5: Solve for x
    x = 7,347,705,524.08/71,272.40
  6. Step 6: Final answer
    x = 103,093.28

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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.