Home / 87,987.36-121,390.73-57,789.04

Finding the Fourth Proportional to 87,987.36, 121,390.73 and 57,789.04

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Solution

The fourth proportional to 87,987.36, 121,390.73 and 57,789.04 is: 79,727.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.36 : 121,390.73 = 57,789.04 : x
  2. Step 2: Convert to fraction form
    87,987.36/121,390.73 = 57,789.04/x
  3. Step 3: Cross multiply
    87,987.36x = 121,390.73 × 57,789.04
  4. Step 4: Simplify right side
    87,987.36x = 7,015,053,751.60
  5. Step 5: Solve for x
    x = 7,015,053,751.60/87,987.36
  6. Step 6: Final answer
    x = 79,727.97

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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.