Home / 81,121.01-121,695.53-36,158.36

Finding the Fourth Proportional to 81,121.01, 121,695.53 and 36,158.36

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Solution

The fourth proportional to 81,121.01, 121,695.53 and 36,158.36 is: 54,243.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.01 : 121,695.53 = 36,158.36 : x
  2. Step 2: Convert to fraction form
    81,121.01/121,695.53 = 36,158.36/x
  3. Step 3: Cross multiply
    81,121.01x = 121,695.53 × 36,158.36
  4. Step 4: Simplify right side
    81,121.01x = 4,400,309,994.86
  5. Step 5: Solve for x
    x = 4,400,309,994.86/81,121.01
  6. Step 6: Final answer
    x = 54,243.78

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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.