Home / 81,149.24-121,729.96-21,984

Finding the Fourth Proportional to 81,149.24, 121,729.96 and 21,984

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Solution

The fourth proportional to 81,149.24, 121,729.96 and 21,984 is: 32,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.24 : 121,729.96 = 21,984 : x
  2. Step 2: Convert to fraction form
    81,149.24/121,729.96 = 21,984/x
  3. Step 3: Cross multiply
    81,149.24x = 121,729.96 × 21,984
  4. Step 4: Simplify right side
    81,149.24x = 2,676,111,440.64
  5. Step 5: Solve for x
    x = 2,676,111,440.64/81,149.24
  6. Step 6: Final answer
    x = 32,977.65

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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.