Home / 120,764.10-181,340.55-91,215.30

Finding the Fourth Proportional to 120,764.10, 181,340.55 and 91,215.30

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Solution

The fourth proportional to 120,764.10, 181,340.55 and 91,215.30 is: 136,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,764.10 : 181,340.55 = 91,215.30 : x
  2. Step 2: Convert to fraction form
    120,764.10/181,340.55 = 91,215.30/x
  3. Step 3: Cross multiply
    120,764.10x = 181,340.55 × 91,215.30
  4. Step 4: Simplify right side
    120,764.10x = 16,541,032,670.42
  5. Step 5: Solve for x
    x = 16,541,032,670.42/120,764.10
  6. Step 6: Final answer
    x = 136,969.78

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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.