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Finding the Fourth Proportional to 68,867.60, 103,301.40 and 47,872.40

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Solution

The fourth proportional to 68,867.60, 103,301.40 and 47,872.40 is: 71,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,867.60 : 103,301.40 = 47,872.40 : x
  2. Step 2: Convert to fraction form
    68,867.60/103,301.40 = 47,872.40/x
  3. Step 3: Cross multiply
    68,867.60x = 103,301.40 × 47,872.40
  4. Step 4: Simplify right side
    68,867.60x = 4,945,285,941.36
  5. Step 5: Solve for x
    x = 4,945,285,941.36/68,867.60
  6. Step 6: Final answer
    x = 71,808.60

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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.