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Finding the Fourth Proportional to 120,319.92, 166,040.91 and 65,877.08

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Solution

The fourth proportional to 120,319.92, 166,040.91 and 65,877.08 is: 90,910.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,319.92 : 166,040.91 = 65,877.08 : x
  2. Step 2: Convert to fraction form
    120,319.92/166,040.91 = 65,877.08/x
  3. Step 3: Cross multiply
    120,319.92x = 166,040.91 × 65,877.08
  4. Step 4: Simplify right side
    120,319.92x = 10,938,289,481.14
  5. Step 5: Solve for x
    x = 10,938,289,481.14/120,319.92
  6. Step 6: Final answer
    x = 90,910.05

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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.