Home / 80,078.22-120,189.77-42,669.89

Finding the Fourth Proportional to 80,078.22, 120,189.77 and 42,669.89

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Solution

The fourth proportional to 80,078.22, 120,189.77 and 42,669.89 is: 64,043.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,078.22 : 120,189.77 = 42,669.89 : x
  2. Step 2: Convert to fraction form
    80,078.22/120,189.77 = 42,669.89/x
  3. Step 3: Cross multiply
    80,078.22x = 120,189.77 × 42,669.89
  4. Step 4: Simplify right side
    80,078.22x = 5,128,484,265.03
  5. Step 5: Solve for x
    x = 5,128,484,265.03/80,078.22
  6. Step 6: Final answer
    x = 64,043.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.