Home / 120,188.12-165,856.54-66,471.80

Finding the Fourth Proportional to 120,188.12, 165,856.54 and 66,471.80

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Solution

The fourth proportional to 120,188.12, 165,856.54 and 66,471.80 is: 91,729.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,188.12 : 165,856.54 = 66,471.80 : x
  2. Step 2: Convert to fraction form
    120,188.12/165,856.54 = 66,471.80/x
  3. Step 3: Cross multiply
    120,188.12x = 165,856.54 × 66,471.80
  4. Step 4: Simplify right side
    120,188.12x = 11,024,782,755.57
  5. Step 5: Solve for x
    x = 11,024,782,755.57/120,188.12
  6. Step 6: Final answer
    x = 91,729.39

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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.