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Finding the Fourth Proportional to 71,364.20, 107,046.30 and 47,863.40

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Solution

The fourth proportional to 71,364.20, 107,046.30 and 47,863.40 is: 71,795.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,364.20 : 107,046.30 = 47,863.40 : x
  2. Step 2: Convert to fraction form
    71,364.20/107,046.30 = 47,863.40/x
  3. Step 3: Cross multiply
    71,364.20x = 107,046.30 × 47,863.40
  4. Step 4: Simplify right side
    71,364.20x = 5,123,599,875.42
  5. Step 5: Solve for x
    x = 5,123,599,875.42/71,364.20
  6. Step 6: Final answer
    x = 71,795.10

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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.