Home / 120,921.87-181,081.13-76,414.35

Finding the Fourth Proportional to 120,921.87, 181,081.13 and 76,414.35

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Solution

The fourth proportional to 120,921.87, 181,081.13 and 76,414.35 is: 114,430.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,921.87 : 181,081.13 = 76,414.35 : x
  2. Step 2: Convert to fraction form
    120,921.87/181,081.13 = 76,414.35/x
  3. Step 3: Cross multiply
    120,921.87x = 181,081.13 × 76,414.35
  4. Step 4: Simplify right side
    120,921.87x = 13,837,196,464.14
  5. Step 5: Solve for x
    x = 13,837,196,464.14/120,921.87
  6. Step 6: Final answer
    x = 114,430.88

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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.