Home / 80,305.47-120,568.55-40,889.07

Finding the Fourth Proportional to 80,305.47, 120,568.55 and 40,889.07

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Solution

The fourth proportional to 80,305.47, 120,568.55 and 40,889.07 is: 61,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,305.47 : 120,568.55 = 40,889.07 : x
  2. Step 2: Convert to fraction form
    80,305.47/120,568.55 = 40,889.07/x
  3. Step 3: Cross multiply
    80,305.47x = 120,568.55 × 40,889.07
  4. Step 4: Simplify right side
    80,305.47x = 4,929,935,676.30
  5. Step 5: Solve for x
    x = 4,929,935,676.30/80,305.47
  6. Step 6: Final answer
    x = 61,389.79

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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.