Home / 87,986.86-121,390.04-57,788.54

Finding the Fourth Proportional to 87,986.86, 121,390.04 and 57,788.54

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Solution

The fourth proportional to 87,986.86, 121,390.04 and 57,788.54 is: 79,727.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,986.86 : 121,390.04 = 57,788.54 : x
  2. Step 2: Convert to fraction form
    87,986.86/121,390.04 = 57,788.54/x
  3. Step 3: Cross multiply
    87,986.86x = 121,390.04 × 57,788.54
  4. Step 4: Simplify right side
    87,986.86x = 7,014,953,174.88
  5. Step 5: Solve for x
    x = 7,014,953,174.88/87,986.86
  6. Step 6: Final answer
    x = 79,727.28

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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.