Home / 120,131.72-165,780.60-66,418.04

Finding the Fourth Proportional to 120,131.72, 165,780.60 and 66,418.04

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Solution

The fourth proportional to 120,131.72, 165,780.60 and 66,418.04 is: 91,656.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,131.72 : 165,780.60 = 66,418.04 : x
  2. Step 2: Convert to fraction form
    120,131.72/165,780.60 = 66,418.04/x
  3. Step 3: Cross multiply
    120,131.72x = 165,780.60 × 66,418.04
  4. Step 4: Simplify right side
    120,131.72x = 11,010,822,522.02
  5. Step 5: Solve for x
    x = 11,010,822,522.02/120,131.72
  6. Step 6: Final answer
    x = 91,656.25

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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.