Home / 87,824.58-121,267.80-81,107.76

Finding the Fourth Proportional to 87,824.58, 121,267.80 and 81,107.76

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Solution

The fourth proportional to 87,824.58, 121,267.80 and 81,107.76 is: 111,993.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,824.58 : 121,267.80 = 81,107.76 : x
  2. Step 2: Convert to fraction form
    87,824.58/121,267.80 = 81,107.76/x
  3. Step 3: Cross multiply
    87,824.58x = 121,267.80 × 81,107.76
  4. Step 4: Simplify right side
    87,824.58x = 9,835,759,618.13
  5. Step 5: Solve for x
    x = 9,835,759,618.13/87,824.58
  6. Step 6: Final answer
    x = 111,993.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.