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Finding the Fourth Proportional to 113,951.80, 171,081.60 and 66,615.40

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Solution

The fourth proportional to 113,951.80, 171,081.60 and 66,615.40 is: 100,013.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,951.80 : 171,081.60 = 66,615.40 : x
  2. Step 2: Convert to fraction form
    113,951.80/171,081.60 = 66,615.40/x
  3. Step 3: Cross multiply
    113,951.80x = 171,081.60 × 66,615.40
  4. Step 4: Simplify right side
    113,951.80x = 11,396,669,216.64
  5. Step 5: Solve for x
    x = 11,396,669,216.64/113,951.80
  6. Step 6: Final answer
    x = 100,013.07

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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.