Home / 87,904-121,323.12-84,987.52

Finding the Fourth Proportional to 87,904, 121,323.12 and 84,987.52

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Solution

The fourth proportional to 87,904, 121,323.12 and 84,987.52 is: 117,297.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,904 : 121,323.12 = 84,987.52 : x
  2. Step 2: Convert to fraction form
    87,904/121,323.12 = 84,987.52/x
  3. Step 3: Cross multiply
    87,904x = 121,323.12 × 84,987.52
  4. Step 4: Simplify right side
    87,904x = 10,310,951,087.46
  5. Step 5: Solve for x
    x = 10,310,951,087.46/87,904
  6. Step 6: Final answer
    x = 117,297.86

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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.