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Finding the Fourth Proportional to 81,995.52, 113,109.60 and 54,818.40

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Solution

The fourth proportional to 81,995.52, 113,109.60 and 54,818.40 is: 75,619.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,995.52 : 113,109.60 = 54,818.40 : x
  2. Step 2: Convert to fraction form
    81,995.52/113,109.60 = 54,818.40/x
  3. Step 3: Cross multiply
    81,995.52x = 113,109.60 × 54,818.40
  4. Step 4: Simplify right side
    81,995.52x = 6,200,487,296.64
  5. Step 5: Solve for x
    x = 6,200,487,296.64/81,995.52
  6. Step 6: Final answer
    x = 75,619.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.