Home / 87,811.86-121,151.79-55,991.01

Finding the Fourth Proportional to 87,811.86, 121,151.79 and 55,991.01

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Solution

The fourth proportional to 87,811.86, 121,151.79 and 55,991.01 is: 77,249.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,811.86 : 121,151.79 = 55,991.01 : x
  2. Step 2: Convert to fraction form
    87,811.86/121,151.79 = 55,991.01/x
  3. Step 3: Cross multiply
    87,811.86x = 121,151.79 × 55,991.01
  4. Step 4: Simplify right side
    87,811.86x = 6,783,411,085.41
  5. Step 5: Solve for x
    x = 6,783,411,085.41/87,811.86
  6. Step 6: Final answer
    x = 77,249.37

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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.