Home / 120,825.12-181,072.08-91,218.72

Finding the Fourth Proportional to 120,825.12, 181,072.08 and 91,218.72

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Solution

The fourth proportional to 120,825.12, 181,072.08 and 91,218.72 is: 136,703.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,825.12 : 181,072.08 = 91,218.72 : x
  2. Step 2: Convert to fraction form
    120,825.12/181,072.08 = 91,218.72/x
  3. Step 3: Cross multiply
    120,825.12x = 181,072.08 × 91,218.72
  4. Step 4: Simplify right side
    120,825.12x = 16,517,163,365.34
  5. Step 5: Solve for x
    x = 16,517,163,365.34/120,825.12
  6. Step 6: Final answer
    x = 136,703.06

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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.