Home / 80,425.78-120,515.66-42,991.18

Finding the Fourth Proportional to 80,425.78, 120,515.66 and 42,991.18

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Solution

The fourth proportional to 80,425.78, 120,515.66 and 42,991.18 is: 64,421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,425.78 : 120,515.66 = 42,991.18 : x
  2. Step 2: Convert to fraction form
    80,425.78/120,515.66 = 42,991.18/x
  3. Step 3: Cross multiply
    80,425.78x = 120,515.66 × 42,991.18
  4. Step 4: Simplify right side
    80,425.78x = 5,181,110,431.88
  5. Step 5: Solve for x
    x = 5,181,110,431.88/80,425.78
  6. Step 6: Final answer
    x = 64,421.02

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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.