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Finding the Fourth Proportional to 100,481.98, 138,661.55 and 56,873.60

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Solution

The fourth proportional to 100,481.98, 138,661.55 and 56,873.60 is: 78,483.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,481.98 : 138,661.55 = 56,873.60 : x
  2. Step 2: Convert to fraction form
    100,481.98/138,661.55 = 56,873.60/x
  3. Step 3: Cross multiply
    100,481.98x = 138,661.55 × 56,873.60
  4. Step 4: Simplify right side
    100,481.98x = 7,886,181,530.08
  5. Step 5: Solve for x
    x = 7,886,181,530.08/100,481.98
  6. Step 6: Final answer
    x = 78,483.54

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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.