Home / 111,028.20-166,542.30-91,345.20

Finding the Fourth Proportional to 111,028.20, 166,542.30 and 91,345.20

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Solution

The fourth proportional to 111,028.20, 166,542.30 and 91,345.20 is: 137,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,028.20 : 166,542.30 = 91,345.20 : x
  2. Step 2: Convert to fraction form
    111,028.20/166,542.30 = 91,345.20/x
  3. Step 3: Cross multiply
    111,028.20x = 166,542.30 × 91,345.20
  4. Step 4: Simplify right side
    111,028.20x = 15,212,839,701.96
  5. Step 5: Solve for x
    x = 15,212,839,701.96/111,028.20
  6. Step 6: Final answer
    x = 137,017.80

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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.