Home / 87,987.24-121,390.56-57,788.93

Finding the Fourth Proportional to 87,987.24, 121,390.56 and 57,788.93

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Solution

The fourth proportional to 87,987.24, 121,390.56 and 57,788.93 is: 79,727.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.24 : 121,390.56 = 57,788.93 : x
  2. Step 2: Convert to fraction form
    87,987.24/121,390.56 = 57,788.93/x
  3. Step 3: Cross multiply
    87,987.24x = 121,390.56 × 57,788.93
  4. Step 4: Simplify right side
    87,987.24x = 7,015,029,967.55
  5. Step 5: Solve for x
    x = 7,015,029,967.55/87,987.24
  6. Step 6: Final answer
    x = 79,727.81

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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.