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Finding the Fourth Proportional to 68,955.50, 103,370.85 and 47,905.40

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Solution

The fourth proportional to 68,955.50, 103,370.85 and 47,905.40 is: 71,814.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,955.50 : 103,370.85 = 47,905.40 : x
  2. Step 2: Convert to fraction form
    68,955.50/103,370.85 = 47,905.40/x
  3. Step 3: Cross multiply
    68,955.50x = 103,370.85 × 47,905.40
  4. Step 4: Simplify right side
    68,955.50x = 4,952,021,917.59
  5. Step 5: Solve for x
    x = 4,952,021,917.59/68,955.50
  6. Step 6: Final answer
    x = 71,814.75

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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.